birch-trees-are-amzing

[birch-trees-are-amzing]

Excuse me! it’s just me, this blog’s stalker because your works amazing. I kinda am in love with your demon’s nature series. I if I could request something. Could you possible do MC seeing the brothers do something that is “demonic”. Similar to what happens in the series. Thank you!!!!

Hello!! Haha, thank you -- we’re so glad you like our content! ;u;

And I’m glad that you enjoy the Demon’s Nature series! It’s been a lot of fun to write.

Sorry this took a bit! I wasn’t sure if you wanted this to be something with one of the brothers or all of them, so I ended up doing little short blurbs for each of the brothers and MC accidentally catching them doing something demonic/violent. Tried to keep them all pretty short, which was hard.

[Mod Cosmos]

MC accidentally catching the Demon Brothers being Demonic/Violent

content warning: blood/gore, body horror (especially in Beel’s), and general violence

Note: This is through the perspective of an MC that knows that the demons do their thing, but perhaps doesn't want to see it happening in front of them.

LUCIFER

You were supposed to go shopping together after meetings for the day were finished, and he had told you to just wait an additional thirty minutes so that he could finish up some business. Thirty minutes passed, but there was still no word from him, so you decide you’ll go and see what was holding that workaholic up. You soon realize that was a mistake.

You hear muffled cries, and a familiar deep voice. Cautiously, you approach the source of these sounds -- a room located off a dark corridor. You didn’t think there were any classrooms here, and your curiosity got the better of you -- so you approach the door, peeking through the crack. You recognize the intimidating silhouette and --- there’s blood. There was another figure in the room, their body limp on the ground in a puddle of red, the mighty first-born’s claws tearing through flesh. A loss of balance in your surprise results in you tumbling into the room, earning a sharp turn from Lucifer, whose crimson eyes were wide in surprise. His wings spread out to try and shield the unsavory scene from you.

“MC, you were supposed to wait for me.” His voice is stern, but there’s a gentleness to it. He sees the queasy look on your face, and decides he can put this torment to an end. With a swift motion, he fully blocks your line of sight before slitting the lesser demon’s throat. He then turns back to you, lightly embracing your body with black feathers. His voice is soft as he did not want to frighten you. “I’m sorry, you weren’t supposed to see that. Let’s get you home, shall we? I’ll make you some tea.”

MAMMON

It had just been a scratch. A low-level demon had taken a swipe at you in passing, but hadn’t been able to cut too deep. Mammon insisted he was just running off to get a bandaid after you insisted he didn’t need to go after the other demon. He said that he’d be right back--”I’m just gettin’ a bandage, I swear!”-- and told you not to move an inch. But this bandage quest was taking longer than it should have, so you go after him, pressing a loose cloth against your wound. And there he was, having cornered the offending demon. He seems to be staking the demon in the arm with a sharp metal object, speaking in a tongue you couldn’t understand.

You hadn’t even realized you had dropped the Majolish bag from your hand, not until it hit the ground with a thud and Mammon whipped around to see you there. A flash of guilt appears on his features, his eyes going between you and the lowly demon. He drops them, though he can’t resist one more swift kick to their chest before running back to you.

“I told ya I’d be right back!” He’s about to cup your face in his hands, but retracts them as he realizes they’re covered in blood. “Uh, okay, let’s go get that,” he motions to your injury, “...taken care of, yeah?” He mumbles a sorry as he picks up the bag you dropped before ushering you away from the scene, promising he’d do whatever he needed to do to make up for having to witness it.

LEVIATHAN

You’re browsing games at a shop, having tagged along with Leviathan who had been raving about a new release. At one point, however, Leviathan had vanished from your side. You now realize it’s been … quite some time, actually. You wander about the store, unable to find him anywhere. Did he step outside? You decide to check, missing the anxious glance from the clerk behind the counter.

You hear some sounds from the alley by the shop. Is that … someone choking? Worried, you round the corner to make sure whoever it was is okay -- only to see the one doing the strangling was Leviathan himself. He had his tail tightly wrapped around the other demon’s throat, and … what, what was that inky substance leaking from their eyes? Leviathan caught your shadow against the alley wall, turning to you with a slightly panicked look.

“M-MC!” His tail quickly slithered off and away from the demon’s throat, leaving them to collapse to the ground. He’s suddenly at your side, hands on your shoulders as he turns you around and makes you walk out of the alley with him, murmuring something about how the venom will take care of the rest. “S-sorry about that, MC. You look a little sick … let’s get that game and go home and play, okay?”

SATAN

You had been ambling through an aisle in the grand Royal Library, wondering what random book you should pick up next to flip through idly. Satan had wanted to spend a quiet day reading and studying together, to which you readily obliged. But it was easy to forget just how large the Royal Library was -- what floor were you on again? -- and you wonder if you should head back to where the two of you had set up. Then you suddenly hear a distant crash. It seemed to be coming from one of the meeting rooms at the back, and you couldn’t help but want to take a peek to see what had happened.

“Fuck you!” You knew that voice, and you knew that anger. There was a muffled yell, and what sounded like shattering glass. Then there’s a chilling, mocking laughter, and you can feel the goosebumps starting to cover your skin. You nervously approach the slightly ajar door, and there he is, his tail impaling another demon with its sharp ridges. Oh, there is fury burning in those eyes -- ones that shift to land on you, and that glowing fury is replaced with exasperation.

“MC!” Your name comes out as a hiss, but he quickly tosses the other demon, slamming them into the wall. “You…” He’s unsure what to say, his wrath calming at the sight of you, especially with that look on your face. “I … I’m sorry, I just had to take care of something. Please, let’s go. We can talk about this later.”

ASMODEUS

The music is loud, the drinks are pouring, and you’re having an absolutely wonderful night out clubbing with Asmodeus. You were returning from the bar with two drinks in hand for the both of you, thanking one of the security guards on your way for managing the crowd of fans that had now dispersed, only to find that Asmodeus was not to be found at your table. He had left a note-- “BRB! ♡”--with lipstick on a napkin. You waited, sipping your drink as you demon watched from your seat. Some time passes, and you realize you’ve finished your drink a bit more quickly than intended. There’s still no sign of him, so you might as well go get another.

On the way to the bar, however, you pass by what you assumed was the hall to the restrooms, and you hear a desperate “I’m sorry!” cutting through the heavy bass. Should you be concerned? Well, you decide to at least be nosy, so you slip into the hall to see what was going on -- and are met with the sight of Asmodeus holding a heart he had carved out of some poor demon’s chest. In your shock, your empty glass slips through your fingers and crashes to the floor, earning your demon’s attention.

“Oh, MC!” Despite his surprise to see you, he gives you a smile -- one that gives you chills as you see blood spattered on his face. “Ah, what a mess…” He lets the lesser demon slide to the floor, debating on what to do with the organ in hand, but hides it behind his back for now, coming over to place a quick kiss on your cheek. “Sorry about that, darling. I’m just going to go clean up, so wait for me at the table, ‘kay?”

BEELZEBUB

You had agreed to go with him to Madame Scream’s after finishing up classes for the day, but he was running late. He’s not picking up any calls, either, so you decide to go to where his last class would have been -- maybe they were just running way over, and he hadn’t realized the time? The hall is quiet, and you end up reaching an empty classroom. Walking back out, you decide to try calling him again. Ring, ring. After a moment, you realize you can hear Beelzebub’s ringtone in the distance, and you follow your ears to where his D.D.D. and ultimately he himself must be.

You weren’t prepared for what you saw next. A head of bright orange hair buried in a lesser demon’s abdomen, the sound of squelching and slurping from his feasting sounding so much more insidious than usual.

“Beel!” You can’t help but cry out his name in shock, which causes him to jolt upright -- with intestines still hanging from his mouth. Oh, you were going to be sick …

“MC … sorry, Lucifer always says I need to work on my table manners … “ He gulps down what was left hanging, but his eyes widen when it registers just who caught him in the act. “Oh, uh, guess that’s not the point, huh … “ He sheepishly wipes at his mouth with some torn cloth that you can only assume came from his victim, standing up and walking around to block your view of the mangled body. “I’ll clean this up, and then … well, we can do whatever you want to do. Sorry, MC …”

BELPHEGOR

You’re looking around for where Belphegor could possibly be napping. Beelzebub had to go to Fangol practice and asked that you make sure his twin got home, as he had seemed even more tired today than usual. He’s not in the Western Courtyard, so you head to the Southern Courtyard next. You think you remember him saying that was one of his favorite spots…

You perk up as you spot the ever-familiar cow patterned pillow, but you fail to see the demon that was usually attached to it. Peering around the area, worry starts to set in -- and then you hear a scream. It certainly didn’t belong to Belphegor, but the gears in your mind start turning and you run to where the scream came from. Of course, no one else was around here -- it wasn’t the busiest area on campus in the first place. Turning a corner, you see just what you feared -- Belphegor had his claws at another demon’s throat, his barbed tail wrapped around their body and squeezing them tight. You feel weak, the scenario a bit too close for comfort as you recall what he had done to you in the past.

“MC?” Belphegor turned to see you, his eyes wide. He must have sensed your presence at some point, or maybe your heart was pounding much louder than you realized. He drops the other demon, growling something you can’t make out to them, and then slowly approaches you. He sees you tense up, causing him to stop in his tracks. He averts his gaze, not wanting to meet your eyes as he tries to figure out what to say. “I just … had to deal with something. You … you can head on home first, if you want. I understand.”

[birch-trees-are-amzing]

do you remember the ask you did for the brothers about mc catching them doing something demonic?? could you do that but with the side characters?

Hi hello this is WAY overdue and I am so sorry it's taken this long to get around to it if you're even still around!! But yes, definitely wanted to do a version with the side characters for this. These...got much longer than the previous ones, so please take that as an apology for taking years to get to this.

Previous post referenced can be found here!

[Mod Cosmos]

MC accidentally catching the Side Characters being Demonic or Violent

content warning: blood, gore, implied body horror

Note: As before, this is from the perspective of an MC that might just not want to necessarily see all this

DIAVOLO

You were staying the night at the Demon Lord's Castle, exhausted after a long day running around with Diavolo. Despite your exhaustion, you find yourself waking up in the middle of the night — and notice that the Demon Prince is no longer resting beside you. Wondering where he's gone and figuring he must have had something to do, you try and fall back asleep, but to no avail. After some tossing and turning, you decide to get up and take a walk to the garden, hoping that its usual tranquility will help bring back the slumber that now escapes you.

On your way, you hear a distant crash, like glass shattering against stone. Remembering the many stories of how haunted the castle was, a chill creeps down your spine. You know its better to leave it be (just go to the garden, you tell yourself) but your curiosity gets the better of you, as it always does. With careful steps, you make your way down the hall from where you heard the crash, the portraits on the wall watching your every move with morbid glee. Every cell in your body is screaming for you to turn back, and you almost do — until you hear a hysterical laugh swiftly cut off by an agonized yell. A muffled voice soon follows, and you recognize it well.

"Your mistake, like all your predecessors, is mistaking my tolerance for weakness." Diavolo's voice becomes clear as you creep towards an archway, and your heart leaps into your throat at the scene before you. Blood stains the walls, a demon you don't recognize made further unrecognizable by the disfigurement of his flesh, as if it was melting from his bones. "A pity it had to come to this, Guthor. I'll send my regards to your little association." The mockery in the prince's voice is rare to hear, and in a flash the other demon is reduced to nothing but cinders.

"—MC?" Your startled at the sound of your name, and before you can blink you find yourself staring into worried golden eyes. "What are you doing here?! You should be asleep." His four wings fully unfurl, as if to block your view of the gruesome remains. "I…I apologize that you witnessed that." He cups your chin, taking in your unsettled expression. "I'll answer any questions you have, but let's first return to my room, shall we? I'll get you whatever you need."

BARBATOS

Your whole body vibrates as bass, drums, and discordant guitar riffs pour out the speakers at Tartarus Hall, a metal show well underway. It's not the usual environment one would find Barbatos, but you jumped at the chance to accompany him to the show when he cautiously offered. It delighted you to see him outside of the stiffness of his day-to-day duties, and although he still doesn't seem to break too much from his usual statuesque nature, you can certainly tell he's more relaxed.

Eventually deciding to take a break from the rowdy crowd, the two of you make your way to the bar for some much needed refreshments. As Barbatos hands you a drink, you notice something grabs his attention — and an ominous shadow falls over his features. Positioning you safely in a corner by the bar, Barbatos gives you a small smile.

"I'm going to use the restroom, so please stay here until I get back."

You nod and wait patiently, enjoying the music from a distance while sipping your drink, wondering what it was that really captured his attention. After a while, you find yourself with an empty glass and still no Barbatos in sight, so you decide you'll make a quick trip to the restroom yourself. After asking the bartender to let your demon companion know of your whereabouts if he gets back before you do, you make your way through the crowd and down a narrow hall lit with neon signs — and that's when you start to hear it. Screams.

At first, you wonder if its just from the vocalist on stage, but it sounds far closer to you than from the speakers. With a gulp, you cautiously turn a corner and can soon make out a familiar voice, muffled behind a door that isn't quite closed all the way. Peering in, you see Barbatos towering over another, a sharp object in his hand glistening with blood. You stomach twists. "I wish I could have more time with you, but I must return to someone far more important." He sighs, ignoring the other's pleas for mercy. "All you traitors sing the same."

In an instant, the other demon is dead on the floor. Before you can even move to take a step back, you find yourself face-to-face with Barbatos, a gasp leaving your lips as his tail captures your waist and pulls you away from the scene and back to the neon corridor.

"You can't help yourself, can you, dear?" Barbatos scolds, though his gaze softens as he checks you over. "I apologize for leaving you for so long, and for having to witness that. Let's go enjoy the rest of the show for now, shall we?"

SIMEON

It had been some time since your last visit to the human world, so Simeon had decided to gift you with a surprise trip — just the two of you, enjoying all that this coastal city had to offer. There was also a local festival in full swing, which meant dragging Simeon stall to stall to try a variety of food and play some games. You both eventually take a break away from all the festivities to enjoy the sunset, the last rays of the daylight disappearing into the horizon as waves crash on rocks below. You turn to smile at Simeon, but notice that something feels…off. In fact, you had sensed a feeling of tension from him since an encounter earlier that day with a less-than-friendly stranger.

"Simeon? Are you okay? You're not still thinking about that guy, are you?"

"Hm? Oh, yes, I'm sorry." Whatever darkness his eyes held a moment ago disappears, his gaze gentle as he looks to you. "Just a little tired, not to worry. Why don't you go look at some souvenirs," he motions to a cute store a few steps away, "…to bring back for the others, and I'll go fetch us some coffee?"

You agree, though can't quite shake off your concern. Watching from the corner of your eye, you see Simeon wander off before turning into an alley. Leaving the souvenir shopping behind, you decide to follow the angel to see what he's really up to. It's quieter in this part of town, and even quieter in the alley with no cafe in sight. You hear a dull thud and quickly follow the noise, peeking around a corner down another alley — only to freeze at what you saw.

It's a dead-end, and a man is backed up against the brick wall, holding a knife out towards Simeon as if in self-defense. You recognize the man as the one who had harassed you earlier, nearly bruising your arm when he tried to drag you off somewhere. You had managed to shake him off and thought that was the end of it, but Simeon clearly had other ideas.

An ethereal glow emanates from the angel, your eyes beginning to sting as your vision becomes slightly warped. The man opens his mouth as if to scream, but no sound comes out, and he drops his knife to the floor. "You are lucky I am only giving you a warning," Simeon's voice seems to echo, his hand now splayed out across the other's chest. "Reflect on your actions and repent, or next time you won't be so lucky."

A flash of light momentarily blinds you, causing you to stumble back. As you regain a sense of your surroundings, you find your face cupped by gentle hands and your gaze met with bewildered celestial eyes.

"MC! I…I'm sorry. That man continued to follow us throughout the day and was intent on hurting you." His voice is full of worry, his fingers flitting across your body to ensure that you were okay. "You weren't supposed to see that."

"Is he—?" You begin to ask.

"He'll be fine, just…terrified for quite some time." Simeon clears his throat, his features showing relief once he's confirmed you're not harmed. "Let's go get something to eat, okay? Whatever you want."

SOLOMON

The last few weeks had been a whirlwind, filled with various events and obligations that had kept you away from your sorcerer studies with Solomon. Far overdue for a lesson, you were finally getting together tonight to practice a few new complicated spells. You decide to stop by the market to pick up a few snacks, texting Solomon to ask if there's anything he wants. A few minutes pass and he fails to respond, so you give him a quick call, assuming he's probably not paying attention to his DDD.

No answer. You sigh and decide to just get what you know he likes before making your way to Purgatory Hall. Taking the more scenic route, you leisurely walk through one of your favorite parks, going over some of the spells in your head — but your mind begins to wander as you notice that Solomon still hasn't returned your texts or call, even though he should be expecting you later. He was usually quick to respond, especially when it came to his "favorite apprentice", as he so often said. He's probably just deep in one of his books or experiments, you assure yourself, but the slight sense of unease forming in your stomach won't go away.

Then, you sense it. A faint warmth on your hand coming from the sorcerer's ring that Solomon had gifted you. He had recently imbued a spell on both your ring and his to let you know when the other was close, but you still were no where near Purgatory Hall. Rather, the ring was pulling you towards another path that went into the forest.

"Stop, stop! I'm sorry, okay?!" You eventually hear a coarse voice, so you quietly hide behind a tree and peer around to see what's going on, eyes widening at what you find. A demon seems to be brutally bound to the floor, blood seeping from his eyes and mouth as he looks up and pleads to the sorcerer who put him in such a position.

"Coming to your senses after you tried to take away mine?" Solomon answers in a mocking and cold tone. "You should have known better than to try your tricks on me, Pinen." He takes a few steps towards the demon, squatting down to get more to his level. "And," his voice is dangerously low and furious, "…you should have thought twice before trying to threaten my apprentice. Have fun getting out of this one."

The demon opens his mouth to scream, but you blink and he's gone. You blink again and find Solomon before you, his hands gently gripping your shoulders and worry in his eyes, a shadow of guilt on his features. Of course, he must have sensed you were nearby.

"Hey, I'm sorry, I didn't mean for you to get caught up in this." He glances down and scoops up the bag that you must have dropped at some point. "I'll explain what happened and what I did once we're out of here, okay?"

[birch-trees-are-amzing]

🔞 Okay, yeah, demons going into heat/rut is hot as hell, but, like, it's even hotter if their rut was triggered by something; say, a cute little human that smells like they need to be bred and pumped full of thick cum until they can't move anymore.

You don't even notice anything different because humans don't really have mating cycles. They don't drive each other wild and uncontrollable with pheromones like animals and beasts do… but demons can smell those pheromones and they are so much more sensitive to them than any human.

You can't go anywhere without one of your local demons getting hot and bothered and just needing to breed you. Going to the kitchen to stop Beel's late night snacking? You'll end up getting stuffed on the kitchen counter. Trying to study in the library? Satan has your legs over his shoulders within a minute of walking in. Visiting the castle for business? Diavolo will have you bouncing in his lap until you've milked him dry.

Student council meetings are the worst. Every demon in the room has their eyes on you, waiting for their chance to bury themselves inside of you. They wouldn't even care who saw. They just know you are in front of them and your body is begging them to claim you. It's a very tense situation until the day they finally all decide to throw you down and take turns filling you up. 🔞

[birch-trees-are-amzing]

hi! [flicks you]

[birch-trees-are-amzing]

꧁༒☬ 𝑜𝒷𝑒𝓎 𝓂𝑒 𝒽𝑒𝒶𝒹𝒸𝒶𝓃𝑜𝓃𝓈: 𝒽𝒶𝓃𝒹𝓌𝓇𝒾𝓉𝒾𝓃𝑔 𝑒𝒹𝒾𝓉𝒾𝑜𝓃 ☬༒꧂

all these fonts are free & available on canva for your fandom purposes!!

[birch-trees-are-amzing]

headcannons: MC who is easily flustered (side characters edition)

You can't help yourself. The slightest teasing remark, accidental brush of fingers, eye contact that lasted just a bit too long, and your face is red, your fidgeting with you hands, and your fighting to avert your gaze. The side characters can't get enough of you (and you can't get enough of them).

Diavolo

He’s delighted. Your reactions are like candy to him, so sincere, so entertaining, so different from the world he usually inhabits. The first time your face turned red when he called you “adorable,” he lit up like a kid discovering a new game. Now he tests your limits daily: “I dreamed about you last night.” “Careful, you’ll make me fall for you.” Each line is said with a booming laugh and a sparkle in his eyes. Just his mere presence is enough to unravel you. He loves leaning down to ‘hear’ you better, he watches how you squirm and back away and it makes him smile. He doesn’t mean to fluster you too badly, but he finds it hard to stop. You’ve become his favorite kind of fun.

Barbatos

You thought he was too composed to tease. Then came the subtle comments, delivered with a straight face and a cup of tea. “You look quite undone today. Did something... ruffle you?” He never outright smirks, but there's always the ghost of amusement dancing behind his eyes. Watching you try to pull yourself together around him is…mesmerizing. He finally understands everyone else's adoration of you. He files away your tells (the shaky breath, the twitch of your fingers) like treasured notes for future use.

Solomon

It’s a scientific curiosity to him at first. The way you unravel at a wink? Fascinating. He tries different strategies—compliments, suggestive tones, “accidentally” brushing your hand. Once, he whispered something in your ear and watched you sputter so badly you dropped your D.D.D. He laughed out loud. Now it’s a full-on experiment. “How red can I get you today?” he wonders aloud. He’s smug about it, yes, but he’s also completely enchanted by you.

Simeon

He’s genuinely concerned at first. “Are you alright? You’re warm—are you sick?” It takes a while for him to realize that it’s not illness, it’s him. That smile, that gentle voice, the way he praises you, it’s too much. And once he understands? He’s flustered too. Every time you flush or avert your eyes, he feels the heat rise in his own cheeks. He never teases on purpose, but he does look at you a little longer now. Lingers a little closer. He may be an angel, but your reactions bring out something undeniably human in him.

Mephistopheles

He lives for it. He pretends it’s beneath him, waving a hand dismissively when your face goes red. “Don’t be ridiculous,” he says, nose in the air. But the next moment, he’s teasing you in that smug, aristocratic tone. He wants you off-balance. He loves when you stutter his name or freeze under his gaze. “Honestly, you make it too easy,” he’ll say, sipping wine like he’s done nothing wrong. But if anyone else makes you flustered? He’s immediately in a sour mood.

Raphael

At first, he doesn’t react at all. Your flushed cheeks, your darting eyes, the way you stammer through a sentence, it barely gets a blink out of him. “You’re easily overwhelmed,” he states flatly, as if he’s diagnosing a mild cold. But you notice it’s always followed by a longer pause before he continues. He watches you, quiet and unreadable. You'll fluster yourself imagining what he’s thinking because he never tells you. But now and then, you’ll catch something: the subtle twitch of a smirk he doesn’t mean to show, a tilt of his head as you fumble your words, a rare, dry comment like, “You’re turning red again,” without even looking up.

Thirteen

You’ve become her favorite toy. She lives to fluster you. Teasing? Constant. Physical proximity? Weaponized. She’ll slink in behind you while you're talking and whisper “Boo,” then grin when you turn five shades of red. She pretends to be scandalous on purpose, saying things like “I had a dream about you last night—should I tell you what happened?” in front of everyone. But she’s careful not to cross lines. She likes seeing you squirm, not genuinely upset. And if someone else teases you and makes you look genuinely uncomfortable? Suddenly, she’s not smiling anymore.

[birch-trees-are-amzing]

headcannons: jealousy

The 7 brothers and their responses to you getting buddy buddy with someone else.

Lucifer

Outwardly calm, inwardly devising a plan to remove the other person.

He tells himself it's beneath him to be jealous—but the way his jaw ticks when you're laughing a little too hard at someone else's joke gives him away.

He won’t interfere directly but will mysteriously show up at your side, arms folded, expression unreadable, standing just close enough to claim territory.

If you ask him directly? He’ll deny it, then casually change the subject and assign you more tasks so you spend more time near him.

You know he's jealous when he offers to escort you to RAD, normally he leaves earlier than anyone else, but he'll put his responsibilities aside (temporarily) until he's satisfied with time spent with you.

Mammon

Horrible at hiding it. Truly, pathetically bad.

Starts off huffy and sulky, arms crossed, muttering under his breath. “Tch, what’s so great about them anyway?”

Gets louder the more he tries to act like he doesn’t care.

Will suddenly be clingier, draping himself over your shoulder, bringing up shared memories loudly in front of whoever made him jealous.

May go full on “I’m your first, remember?!”

Will probably demand cuddles or attention afterward and won’t let go until his pride is patched (which may take a while).

Leviathan

Avatar of Envy, duh.

Withdraws first. Goes quiet. Eyes follow you but he doesn’t say much.

Starts comparing himself to the person you're talking to, convinced they’re cooler, more normie-attractive, probably a better match.

Will game aggressively to distract himself, drown himself in anime and manga, but he starts seeing parallels so he freaks out even more.

Needs reassurance, a lot of it. His face will be hiding in his hoodie and you know you've won him over when he finally stops hiding in it.

Satan

Possessive in subtle ways.

Doesn’t make a scene, but will insert himself into the conversation with charm that borders on cold.

Suddenly has facts or anecdotes that one-up the person you're with, effortlessly.

His smile doesn't reach his eyes when he’s jealous. That’s the tell.

Will call you out later in private, “You seemed very entertained tonight.”

If you reassure him, he relaxes instantly—maybe even smirks and says, “Good. I don’t share what’s mine.”

Asmodeus

Jealousy? From him? Never... unless… wait, are you flirting??

Overcompensates by trying to outshine whoever you’re talking to. Laughs louder, touches your arm more often, plays the charm up to eleven.

If it doesn’t work, he deflates a little.

Will pout in your room later, lounging upside down on your bed, demanding, “Do I not make your heart flutter anymore?”

Needs physical affection to feel reassured: cuddles, kisses, anything to remind him he's still your favorite.

Once soothed, he snaps back to being sunshine and glitter like nothing happened.

Beelzebub

Confused at first. Then bothered. Then protective.

Doesn’t know why he suddenly doesn’t like the way someone’s leaning too close to you, but it makes his stomach twist in a way that isn’t hunger.

Watches you quietly, then stands behind you like a silent wall.

Subtly moves you closer to him—maybe by offering you food or gently steering you away.

If pushed too far, he might say “I think you’re standing a little too close” straight to the point.

Tells you afterward, “I didn’t like the way they looked at you,” and hopes that’s enough to explain it.

Belphegor

Doesn’t hide it. Blatantly obvious.

Glares openly. Broods. Gives the person you're with a long, deadpan stare that makes most people nervous.

Will pull you into naps more often. Hugs you tighter. Might whisper snide things about the other person as he drifts off on your shoulder.

“Tch. Can’t believe you were smiling like that for them”

Will absolutely steal your blanket and refuse to share it until you give him a kiss or acknowledge he’s your favorite.

Grumbles less once you curl up next to him, but still mutters “Mine” under his breath when he thinks you’re asleep.

[birch-trees-are-amzing]

headcannons: MC who is easily flustered

Face turning red, stumbling over words, eyes darting away at the smallest teasing gesture—you’ve basically handed each of the brothers a brand-new obsession on a silver platter. Here’s how they react:

Lucifer

He notices immediately. The first time you stammer under his gaze or blush at a compliment, he files it away like valuable intel. He doesn't exploit it constantly—he has standards—but every now and then, he'll lean just a little closer when speaking, drop your name in that low voice of his, and smirk when you freeze.

“You’re very reactive tonight, MC. Something on your mind?”

It's not just amusement, he likes how honest your reactions are. In a world of lies and masks, your flustered state is a rare kind of sincerity. He treasures it… quietly, and with a hint of pride.

Mammon

Absolutely obsessed. The second he realizes you get flustered easily, it becomes his new favorite pastime. He lives for it. Winks, sly touches, cocky grins; it’s game over for your composure.

“Wha—did ya just blush? Hey! Don’t hide your face, c’mon, let me see!”

He gets all flustered himself after teasing you too much, though. Like he short-circuits watching you squirm and then goes red too, stammering, “A-Anyway! Quit lookin’ at me like that, damn…”

He’ll deny it to death, but he thinks you’re adorable.

He short-circuits right alongside you. The moment you get flustered, he mirrors it with double the intensity.

Leviathan

“You—you’re blushing?! Because of me?!”

Then he spirals. “W-wait, does that mean you actually like me?! I mean, you must a little, right?! Oh my god, this is just like in My Demon Prince Falls for a Human!”

He’ll still tease you, but only after he recovers from his own internal meltdown. Expect mutual embarrassment, accidental hand-holding, and a lot of him shrieking into a pillow later.

Satan

He finds it fascinating. And completely irresistible. He loves testing the boundaries, an innocent compliment, a whispered phrase near your ear, brushing your hand with his fingers just to see you twitch.

“It’s so easy to read you… You’re like an open book.”

He’ll tease gently, never cruelly, but he’s definitely studying your reactions like he’s trying to write a thesis on them. And if someone else flusters you? Expect narrowed eyes and a possessive arm around your waist next time you pass him in the hall.

Asmodeus

He lives for this.

“You’re so cute when you’re embarrassed! Look at that blush! Is it me? Or is it just my presence?”

He’ll take you apart with fluttering lashes and sultry praise, draping over you like a satisfied cat. He thrives on your every squirm, every nervous glance. And when he’s feeling generous, he’ll soothe you with a soft smile and a gentle, “Relax, darling… I’ll be gentle.”

(He absolutely won’t. But the way you react? Worth every second.)

Beelzebub

At first, he’s confused. “Are you okay? Your face is red.”

Once he realizes it’s just you being flustered from his closeness or compliments, he goes quiet for a second… then smiles softly. “I think that’s really cute.”

Beel doesn’t tease much, but he’ll do little things intentionally once he knows it flusters you, standing closer, resting a hand on your shoulder, casually lifting you out of the way with one arm (feeling his muscles, you almost pass out). He’s a walking fluster trap and doesn’t even mean to be.

Belphegor

He finds it hilarious. The second you blush at something he says, he’s grinning like a devil.

“Oho? You’re that easy, huh?”

Belphie teases in a lazy, low voice, usually while lounging across your lap or invading your space in that way that makes your brain short-circuit. He lives to watch you cover your face.

But he also finds it... weirdly endearing. You’re soft around the edges in a way that makes him want to pull you close and bury his face in your neck.

“Don’t worry,” he’ll murmur when you’re red and hiding. “I like you like this.”

[birch-trees-are-amzing]

headcannons: the moment they fell in love

You’d been with the brothers for some time now, long enough to recognize their habits, their moods, the way each of them loved in their own unique language. They didn’t fall all at once. It was gradual, quiet in some cases and impossible to ignore in others. Each of them warmed up to you at their own pace, but when it hit, when they realized they’d fallen for you, they fell hard. And there was no going back.

Lucifer — Slow-burn, recognition over time

Lucifer doesn’t fall easily. He resists the idea of being emotionally compromised. For him, it wasn’t a dramatic moment, it was a gradual accumulation. He notices how you hold your own, how you work hard without necessarily being noticed, how you ease the burden of handling his brothers, and how you effortlessly calm him during times of stress. But the moment hits one evening after a long council meeting. He comes home and finds you waiting for him. The house is quiet, no chaos, seemingly you took care of everything so he could come home to peace. You smile and hand him a cup of tea. No words, just an understanding. His eyebrows lift ever so slightly, he takes the tea and gives you a soft thanks. He feels it then: a rare warmth that makes the silence between you more comfortable than any conversation. He doesn't panic, but he does retreat, quietly adjusting his cuffs, unsure what to do with something so... human. He'll often just stare at you, thinking to himself about his feelings. If you meet his gaze he'll look away briefly, clear his throat and pretend to do something else. How has a human infiltrated his heart and mind like this? Ridiculous, he mutters to himself, but the way his chest tightens says he believes otherwise.

Mammon — Love at first sight, but he doesn't know it yet

The second he lays eyes on you, he knows you’re different. But he brushes it off, calls it curiosity, interest, maybe even a small crush. He's always in your room, invading your privacy, being clingy, he never asked himself why he liked being around you, because he was scared of the answer. It’s not until he finds himself instinctively stepping in front of you during a threat, heart racing, fists clenched, that it clicks. He’s terrified by how badly he wants to protect you. His reaction? Defensiveness. Lots of “It’s not like I like you or anything!” and awkward attempts at distancing himself, which only pull him in closer. The realization hits him fully when you defend him, a moment of unexpected loyalty. His heart stutters, and he can’t look you in the eye. “Damn it,” he mutters under his breath, voice shaky, “Why do you make me feel this way?” A few weeks pass and you notice his face turns red if you stare at him too long. Sometimes he just paces around his room internally panicking after an interaction with you, thinking you know his secret–his love for you–as if it isn't blatantly obvious.

Leviathan — Slow-burn, denial stage included

Levi thinks he’s not the kind of person people fall for, so he never lets himself consider falling for someone either. At first, he tries to categorize his fondness for you like he would a favorite character: someone cool, rare, different. But when you stay up with him during a new game release, and he looks over to find you curled against him, your gentle presence grounding him in reality, it hurts a little. It's too real. His chest tightens and he looks away fast, slinking deeper into his hoodie to hide the color rising in his face. “You’re just... too good at co-op,” he mutters. But in his heart, he knows it’s more. He doesn’t understand how someone like you, someone real, could sit beside him and make the world outside his screen feel more important. He falls quietly, helplessly, and never stops. He tries to convince himself later, when he's alone, that his love for Ruri-chan is enough for him, but when he remembers how lonely he felt before meeting you, he knows there's nobody else he'd rather fall for.

Satan — A gradual slide that becomes undeniable

For Satan, love is built on intellectual connection and emotional honesty. You win his attention when you match him in wit, push back when he's teasing, and listen when he's serious. Normally people find him brash or rude, but you seem to soften his edge. You're not put off by him as others are, so he's always respected you for it. But the moment he falls is much softer. You're helping him reorganize his library after a particularly bad outburst. He’s frustrated with himself, expecting you to be wary of him, but instead, you smile and ask if the fiction should go alphabetically or by theme. Your calm in the aftermath of his rage, your easy presence among the ruined books and sharp silence, feels like a balm he didn’t know he needed. The way you normalize his worst parts, without pity, undoes him. He realizes then that he wants your presence in both the quiet and the chaos. His reaction? A thoughtful pause, followed by a soft, genuine smile he rarely shows. He doesn't say anything right away, but from then on, he looks for more excuses to spend time with you.

Asmodeus — Instant attraction, deeper love over time

Asmo knew you were different when he realized his magic charm didn't work on you. People were easily enamored by him, but you? He flirts, of course, testing boundaries with a twinkle in his eye. But when you don't play into it the way others do,when you're gentle with him as a person, not just a pretty face, he becomes genuinely curious. You listen when he talks about the things no one else cares to ask, his insecurities, his quietest dreams,and he finds himself saying more than he meant to. The moment it turns to love is intimate: you catch him in his room late one night, makeup half-removed, smile nowhere in sight. As much as Asmo portrays himself as unbothered, he's not immune to negative emotion. You ask if he wants company without expecting anything. There’s no performance in your voice, no angle, just care, and he realizes he doesn’t know how to protect himself from that. When he nods and you sit beside him, just being there, he leans into your shoulder and thinks: This must be what love feels like. Even in silence, he feels adored, not because of how he looks, but because of who he is. It terrifies and thrills him. He clings a little tighter that night.

Beelzebub— Slow, steady, and deeply rooted

Beel falls in love the way trees grow: quiet, strong, and always. It starts when you offer him food without fear or judgment. It deepens when you sit beside him in silence, content just to be near. But the moment hits him one day in the kitchen. You’re making something for everyone, humming to yourself, flour dusting your sleeves. He sees how happy you look caring for others, and his chest feels warm in a way hunger can’t explain. You offer him a spoon to taste and smile like it's nothing, but to him it feels like everything. He watches you move around the kitchen like you belong in his world, like this moment was always meant to be. It’s not loud or dramatic, but it settles in him so deeply he knows it won’t leave. He doesn’t say the words, but from that moment on, he’s all in. His love is simple: he shows up, carries your weight, and never lets go. He’d protect that quiet kind of joy you bring with the same devotion he gives his family.

Belphegor — Reluctant love, but impossible to ignore

Belphie fights it. Hard. After everything he’s done, he doesn’t think he deserves your kindness. At first, he pushes your affection away with sarcasm, trying to keep you at arm’s length. But the moment he falls is unexpectedly vulnerable. You find him asleep in the planetarium, clearly exhausted and wanting to get away from the chaos inside the house, and instead of waking him, you sit beside him and stay. When he wakes, still half-dreaming, he sees you there. head resting on his shoulder, trusting him enough to fall asleep too. It breaks him open. You didn’t ask for anything, didn’t pry or judge, just chose to exist quietly with him, and that choice mattered more than he could ever say. The ache in his chest wasn’t guilt this time, but something heavier and gentler all at once. He doesn't speak, just watches you breathe for a moment, and something soft and sharp settles in his chest. He falls quietly, but it hits like gravity. He’ll never admit it out loud, not yet, but from that night on, he sleeps better knowing you exist. He starts finding more reasons to linger near you, even if it’s just in the same room, like your presence tethers him to the better parts of himself.

[birch-trees-are-amzing]

MC: ...

MC: Okay, Mr. Nice Demon King... You're saying that I'm your spouse and this is my fourth reincarnation.

MC: And you're here to take me once again to be with you

MC: For my entire lifetime?

Diavolo: Yes! Exactly, my love!

MC: ...

MC: So... Is 'Till death do us part' not a thing?

Diavolo: *pulls out their marriage contract*

MC: ...Okay. I'm not gonna read that.

Diavolo: Do you trust me now?

MC: Yeah, sure. Though I need time to fall in love with you.

Diavolo: It won't take a month.

MC: ...

MC: Huh. That's some confidence there.

Diavolo: *smiles cutely*

[birch-trees-are-amzing]

Snowfall in the Devildom. Sparkling white snow blanketing everything, turning the world quiet. There's quite a bit of it, to the point that all RAD classes were cancelled.

You sit by the fireplace in a blanket sipping a warm drink that someone prepared for you. The snow has stopped, but you can see flurries floating by on the wind outside. Occasional gales sneak through cracks in the window and whistle.

Someone shouts. There's stomping on the roof where the brothers have gathered to get rid of the heavy snow before it damages the house. You watch a Mammon-shaped shadow fall off the roof and take another sip of your drink.

Mammon shakes himself off and shifts into demon form. You wonder if he's cold without a shirt on. He jumps, soaring back up to the top of the house where more squabbling occurs. It's hard to make out any words.

You watch Leviathan fall off the roof this time. The end of his tail is caught around Belphegor's leg. Their shouts harmonize with the wind and a cloud of powdered snow is kicked up by their impact.

You re-adjust your blanket. You're glad they didn't invite you to clear off the roof.

[birch-trees-are-amzing]

You had a spa day with Asmodeus once. It didn't go very well.

The cucumber eye treatment was nice, especially as cucumbers are hard to come by outside of the human world. They were fresh and fragrant and Asmodeus prepared some for you to snack on while moisturizing your eyes.

The hot towels were amazing. All of the stiffness in your shoulders, gone within moments. The two of you got giant, fluffy towels and warmed them with magic. Wrapping yourselves in them was like being enveloped by a giant hug.

The herbal face masks were fun. A little itchy, but they contained all kinds of grasses and honey that would supposedly help your skin. If Asmo says so, it must be true.

It was too bad you left the door open. You had to, seeing as there was so much steam.

You heard a roar that shook fear into your very core and flung your eyes open, wiping off the cucumbers and part of your face mask. You got up a little too fast - it made you dizzy. You fell back into your seat to a symphony of snapping wood and growls.

Asmodeus was in his demon form, a quick and handy way for him to get dressed. He was shouting, "you've got the wrong idea! Let me go!" while firing off curses.

You hugged the towel close for protection as a piece of stone whizzed past your ear.

There was a flurry of black and a flash of red hair. Beelzebub's hair. He attempted to headbutt Asmodeus and was desperately trying to reach you. "You can't!" he yelled. "How could you?" His wings flared up behind him, adding a loud buzz to the chaos.

If this went on for much longer, someone was going to get overpowered. Either Beelzebub would be charmed into submission or Asmodeus would never stop complaining about his injuries. Both would lead to more headaches. You used your power to prevent further destruction with a hearty "stay!"

It was as strong as you could muster in the moment. The two fighting demons, and whoever else unfortunately happened to be home at the time, shuddered to a halt and collapsed onto the ground. The dust began to settle. You weren't lifting the command until you found out exactly what happened.

"What is wrong with you?" Asmodeus screeched. His hair was a mess. Any weaker demon would probably be dead from his glare alone.

"You can't cook the human!" Beelzebub asserted, tears in the corners of his eyes and a speck of drool on his chin. "No matter how good they look, you can't! We all agreed!"

Asmodeus wanted to smack his brother. "We're having a spa day, you muscle-headed buffoon!"

Beelzebub huffed. He was catching his breath. "You put all those seasonings on and wrapped them like a burrito. You can't fool me."

The siblings gave each other the evil eye. You left them on the floor while you tried to calm your racing heart enough to diffuse this horrible misunderstanding.

[birch-trees-are-amzing]

Seeing Satan interact with strays around the RAD campus gives you an idea. You decide to try it out when he's alone in the household library later.

As usual, he invites you to sit with him. When no one else is around, it's fine if you sit in his lap. It's your special privilege.

You take a peek at what he's reading. It looks boring, though his eyes are glued to the page. His blue irises shift in the light as they go back and forth across the page. It's a pretty sight.

When you raise a hand to his cheek, Satan leans his face into your palm. A natural gesture. He doesn't even look up. It signals the perfect time to put your plan into action. You begin to move your fingertips, gently scratching around the bottom of his ear in small circles. Just barely grazing his skin with your nails.

He stiffens with a look of pure confusion. Concentration broken, his gaze is finally directed at you.

Now that he's not distracted by the novel, your other hand makes its way to the crown of his head for more scritches. You go back and forth, mimicking the satisfying way Satan always does it to the strays around town. His soft blonde hair parts easily as you lightly scratch at his scalp.

"What do you think you're doing?" A blush spreads across his entire face, from cheek to ear. Perhaps your experiment went too far.

"I thought you'd like this," you admit. It seems to have the opposite effect, though. Instead of relaxing, Satan was straining his entire body. His grip on the chair's arm dug into its upholstery. You drop your hands and opt to lean against him instead.

He places his book aside. "I do. Why did you stop?"

"Really?" With newfound confidence, you graze two fingernails against the bottom of his chin, working in small zig zags. "So you like this?"

His breathing turns erratic. Satan grabs your wrist in an oddly strong hold and orders, "wait. Not here."

In a rush, he clutches you against his chest and stands up. There's so much force behind his movement, the armchair skids back several paces. It'll be faster if Satan carries you, and you can keep scratching his chin while he walks.

"Come with me, we'll try this out again in my room."

[birch-trees-are-amzing]

Lucifer with a habit of fussing over you in slightly sadistic ways. He's a busybody who cannot stop working. When he does have free time, he needs something to fill it, and you are the perfect target.

He isn't excessive about it. Any being worth standing next to the Avatar of Pride is already exceptional in their own right. He trusts your judgement, he knows you're more than capable. You've proven that time and time again.

Yet there's something about you that he just can't leave alone. The feeling that fills Lucifer when he sees you is almost as strong as his sin. It's magnetic and addicting.

Lucifer combs lint off your clothes and fixes even the most minor parts of your appearance. You are a source of his pride, after all.

He'll give you accessories, charms. Anything in his color that marks you as his. He won't be upset if you refuse to wear them, though he will feel the need to show others that you belong to him in other ways.

He likes to catch you off guard, to suddenly loom over you just to brush a stray leaf off the back of your head. Your flustered expression always brings a mischievous smile to his face.

He'll turn your face towards his and lean in, so close that the smell of his breath fills your nose, just to inform you that "you have a bit of sleep next to your eye. Wipe it off."

He seems like the perfect gentleman, escorting you and guiding you out of harm's way. It's a ploy to keep you in arm's reach. With a single tug he can drag you away from danger and straight to his side. Whether it be a passing vehicle, a stray spell shooting through the air, or a sudden downpour. Or maybe he just likes to make up excuses to hold you against him.

You'd be most safe with his arms wrapped around you in a private room locked from the inside, but this much should be sufficient in public.

[birch-trees-are-amzing]

Demon brothers weaponizing their incompetence in the human world to get your attention. Your realm is sooo different to the Devildom, they need you to help them. These ancient and powerful beings are stumped by the incredible inventions of human ingenuity.

Or maybe they're taking advantage of you to monopolize your time.

---

Beelzebub, who had been using a fork just fine all day, suddenly forgets what it's for when you walk into the room. He fiddles with it in his hand and asks, "How does this human fork work?

You respond, confused, "It's the same as any fork? Literally the same as the Devildom, you just... stab the food and put it in your mouth."

"Belphie said human forks are different. You might have to feed me."

---

Asmodeus comes to you in a bath robe, which he managed to put on just fine by himself. "I don't know how human baths work, you'll have to take one with me!"

Belphegor's request is simple. He's already laying down, half asleep, when he grabs your wrist and demands, "Show me how the bed works."

---

"Lucifer, your brothers are driving me crazy again," you complain, having fled to the eldest's room for a moment of reprieve.

Red eyes peer at you from over the rim of his glasses. There's the faint curl of a smile on his lips. "Are they, now? Stay in here as long as you need."

[birch-trees-are-amzing]

A thin line of table salt adorned the floor in front of your bedroom. You stood behind it and stared at the demons outside of your doorway. They were staring at the salt.

Leviathan laughed. It reminded him of a low-level defense from a tower defense game. "Is that supposed to keep us out? lol."

"Yeah. I think it's working," you said.

Satan put a hand on his hip. As far as he could tell, it was plain old table salt. No magical properties whatsoever. "How so?"

"Well, none of you are crossing it. Clearly, it's having some kind of effect."

Mammon balked. "Obviously, it's because we're respectin' your privacy!" He stood closest to the line, wanting to cross it most of all.

"You're respecting my privacy by... standing right outside my door?"

Mammon opened his mouth to counter, only to come up with nothing. He stood there with his fists clenched. The feather on his belt swayed as he tapped a foot impatiently, causing the nearest salt to shift a little.

The noise annoyed Asmodeus. "Mammon, go walk through the salt."

"Why me!?"

"This is ridiculous." Lucifer crossed his arms. "Clean this up. I don't even want to know how this will damage the floors if you leave it."

"It's not even doing anything," Satan pointed out.

"If it's not doing anything, then one of you should cross it," you suggested.

"Why don't you come out to us?" Belphegor proposed. "There's only one of you, seems more fair."

"Yeah!" Asmodeus took a step away from the salt, careful not to get any on his shoes, and raised his hands. "You can run into my arms if you'd like. I'll be sure to catch you."

Their stubbornness astounded you. "Or... You guys can just admit you don't want to cross this salt."

"It's regular salt." Beelzebub knew exactly what the substance was as soon as he laid eyes on it. Plus, the smell was unmistakable. His claim was irrefutable.

"Yes, exactly. Thank you, Beel. I've seen you eat it many times." You had even taken the bag from the shared kitchen.

"Did you try walking over it?" Leviathan asked. "How are we supposed to cross it if you won't?"

"I don't need to. I'm in my room."

"You should come to our room," Belphegor offered. He was getting tired of standing around.

"Come out this instant," Lucifer ordered.

You thought about it for a whopping two seconds. "I think I'm good. I'll be in my room. If any of you need me, feel free to come in."

You retreated back inside with the rest of the half-empty salt bag. The brothers stared at you with a mix of impatience and disbelief until the wall blocked you from view.

[birch-trees-are-amzing]

Barbatos: Besides the fact that I'm aesthetically pleasing, what else do you find attractive about me?

MC: Your professionalism and sadistic tendencies.

Barbatos: ...

Barbatos: *smiles* I appreciate the honesty.

Barbatos: Would you like to spend time together as a reward?

Lucifer and Diavolo: ...

Lucifer:You're not supposed to flirt during your working hours.

Diavolo: Yeah. Like Lucifer said.

Barbatos: *chuckles* I intend to do it after I'm done with my duties.

Lucifer: Diavolo, make sure to keep him busy.

Diavolo: Understood.

MC: ...