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biffhofosho · 2 years

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The Heat of the Night

Fandom: Monsta X

Genre: Smut, natch.

Word Count: 9.4k

Pairing: I.M x OC

Trope: Rivals to lovers

Synopsis: When the Bastard Demon of Gomorrah clashes with the Hellion of Hades, the bedroom becomes a battlefield where only one can come out on top.

The Vibe: Incubus meets succubus, sex demons who think too highly of themselves, an unforgettable showdown in the Middle Ages leads to a highly anticipated reunion, demons being demons but also experiencing things they’re not supposed to feel, banter and baiting, loads of overt sexuality, basically the whole thing is sex lmao, seduction, sexual favors for trade, chains, paralytic venom because demon, various other demon anatomy heh, battles for dominance, multiple supernatural orgasms lol, rough sex morphs into something else, false confidence and existential crises, a demon love story???

A/N: Well, uh, this… This did not go as I had planned, but I was feeling feelings I guess. Inspired by Jackson Wang’s most excellent video, “Cruel,” because that shit changed my life. Happy Halloween, little demons!

Changkyun leans over the foot of tonight’s bed. The feet beneath the thin sheets are already writhing in some unseen dance. The soft shifting sets a backing track to the refrain of ragged gasps echoing up from the pillow.

His eyes are red, filled with a ring of fire the same way his limbs are. He feels powerful. He feels energized. He’s ready for anything.

Except the clawed hands that encircle his neck from behind.

“Well, well, well,” says a raspy voice in his ear, “if it isn’t the Bastard Demon of Gomorrah. I haven’t seen you since the Black Plague.”

It might have been 700 years, but Changkyun hasn’t forgotten that voice. He stiffens in the grip of those claws.

“Not long enough,” he rasps in return, though his own voice is shaped not by his natural tone but by the pressure on his windpipe.

One hand releases his throat to thump his chest, which echoes hollowly in the bedroom. “I see absence hasn’t made the heart grow fonder then.”

“What heart?” he mocks.

Slowly, the other hand around his neck unwinds and air rushes back into his lungs. It wouldn’t have killed him of course, but it also wouldn’t have stopped her from trying.

“What are you doing here, Changkyun?” the interloper asks in a familiar tone, as deep and textured as velour.

“Same as you, I expect. Dinner.”

He rubs his throat and turns around, eying the creature behind him. She is sex incarnate, but that should come as no surprise for a succubus since she was made to be irresistible. Still, Changkyun has been around enough of them to know that this one is different—special; she’d have to be to have earned the Hellion of Hades moniker.

She’s got an hourglass figure, textbook perfect proportions with voluptuous tits and thick hips, where her chestnut hair tumbles in glossy waves. It is wild just as she is wild, voluminous and commanding somehow, and strangely, Changkyun envisions it like a curtain shrouding him as she looms above him, encapsulating them in their own private room.

Her skin is a luscious caramel color, no doubt tanned by all the hellfire, same as his own. Of course, she doesn’t bother wearing very much to cover it, just as he doesn’t, because there isn’t a point to it. Her black bodycon looks painted on, clinging for dear life just under the swell of her ass. The wrap-around halter exposes a large triangle of taut stomach and the underside of those delicious tits, where so much as a finger to the fabric will expose her nipples. They are already jutting in anticipation of her feed, and he doesn’t bother trying to hide his stare.

But none of this is what makes her special.

It’s her eyes.

Changkyun imagines what it is like to wait in dreams for those eyes to appear on the horizon. They’re big and bold, shaped like sunflower petals and the same golden color, too, though there is nothing soft or gentle about them. They chart and dissect and unnerve, missing nothing as they size up their prey. When they do still, it’s like the sun itself has trained on him, and he feels far too seen, like they have burned through the illusion of his human skin to the shimmering scales beneath.

“You've lost your edge,” she remarks with a smirk.

“Never,” he asserts, but the Bastard Demon of Gomorrah feels an odd tickle at the back of his neck like maybe, just maybe, he might have.

She tuts. “Didn’t even hear me coming, and I brought my chains…”

She fingers the belly chain at her waist, and Changkyun hates how she manipulates him into looking at it. Now, he’s fixated on her hips and how well they would open to accommodate him if he had an ounce less knowledge about the hellcat his fellow demon is.

He may have followed her exploits inadvertently over the years. It’s not his fault if the word hellion has become a more frequent word in his vocabulary and happens to come out a little more often when he encounters other demons, and he’s certainly not responsible when one of them spills a tale of a run-in with the Hellion of Hades.

“You’ve never been worth my notice, Andromeda,” he says.

The succubus’s face falls, and Changkyun feels like he finally has the upper hand. They don’t call him a bastard for nothing.

“Oh, fuck off,” she snaps now that their games have unceremoniously ended in his favor. “I’ve had my eye on this one for over a week.”

“Nice try. There are no dibs in the Underworld. If there were, we wouldn’t have had our little showdown in the Middle Ages, would we?”

“You ruined that for everyone, you little shit.”

Changkyun quirks a brow along with the corner of his lips. “And I’m not above doing that again.”

His nail elongates on his finger into a thin, wicked claw like a dragon tooth begging to sink into flesh. He brings it to the foot of the woman in the bed and drags it up her sensitive arch. She jerks and grunts in her sleep. Her eyelids flutter, and he knows another pass will coax her awake and out of their reach.

“Stop!” Andromeda commands. “Little fucker.”

“Leave then.”

“You know how hard it is to find a soul-sack still holding out for marriage these days. I’d say this one has at least a full decade of sexual frustration ready to be released.”

Andromeda sounds a little whiny and even more desperate, and Changkyun figures the succubus hasn’t properly fed in a few days. Whatever the reason, her neediness is making him needy, and it’s turning him on far more than it should considering how, after more than half an eon, he still hasn’t forgotten Rome or the way her wrists felt thrashing beneath him, nor has he forgotten how his cock had pressed against her like a traitorous conspirator, begging against his better judgment to bury itself in her tight little hole.

Not that they’d ever fucked, of course. Over the years, when Andromeda had crossed his mind against his will, Changkyun had convinced himself that his massive hard-on had been an unfortunate consequence of their battle. Nothing a demon likes better than a good fight, he told himself, and theirs had been the best he’d ever had, filled with teeth and claws and catastrophic damage, so all his subsequent erections over her through the years must have spawned from its mere memory.

But here she is again, the Hellion of Hades and the scourge of his subconscious, flouting a bondage enthusiast’s dream instead of the silk and velvet gown that had concealed her many assets the last time they’d met. Changkyun resents how effortlessly his body responds to her. He must work harder to assert his dominance.

“Which is why I’m here,” he informs as he turns back to the once-again immobile human in the bed. “First come, first serve.”

Andromeda slithers closer, her bare arm brushing his forearm. It stings as much as a bite, and the way his skin tingles is just as toxic. Her voice undulates like a snake through water as she says, “Let me have this one, Changkyun. Come on, you owe me after Rome. We demons may not honor dibs, but we do love to call in debts.”

“Your tongue’s still dipped in silver, I see.”

“Mm, still forked, too,” she replies, but if that’s true, she doesn’t let him see it, and his mind is in overdrive.

His only way out of this madness is through it. He has to get her out of his veins one way or another. Seven hundred years is far too long to think about anyone but himself, especially a cunning but enchanting succubus he’s only squared off with once.

“What if I don’t acknowledge a debt?” he challenges.

“And what if I plague you worse than our beloved Black Death, hm?”

Their eyes blaze when they meet, neither one capable of backing down. It’s starting to look like another Rome where they both leave unsatisfied, but Changkyun’s not sure he’s got the mettle to endure a full eon of unprecedented blue balls. Fate has gifted him a chance to settle an old score the way he’d wished he had in the first place, all while getting everything he wants, if he plays his cards right.

He runs a hand through his long black hair and savors the way Andromeda’s eyes break to follow it.

“What if,” he begins in his oiliest voice, “I propose a deal instead? We love our deals, too, don’t we?”

She’s silent as she considers and then: “I’m listening.”

“I have something you want, and you have something I want. The way I see it, you really want this full-course buffet—in fact, you look like your really, really need it—and maybe now my appetite’s changed. I could be persuaded for something a little… off-menu.”

Changkyun shoots a pointed look at Andromeda’s body and feels the first serious twitchings in his cock. Like it or not, his body’s been reacting to her since the second her siren voice coiled in his ear, or, more truthfully, since Rome.

The succubus glowers at him. “I don’t fuck incubi.”

“Why not? Afraid I’ll know all your tricks or just afraid I’ll ruin you to all other sex?”

“Because you’re cocky as hell, but you’ll never deliver, at least not for a creature you can’t manipulate into thinking you did.”

Flares blossom in Changkyun’s eyes. “And humans deliver?”

“I have total control there, don’t I? I make sure they fill me up just right,” she adds with a coy smile that absolutely infuriates him. “And you, Changkyun, you’re a bastard and proud of it. I’m not in the mood to be used.”

“But you are in the mood to feed. How hungry are you?”

Andromeda doesn’t move, so he does. The incubus reaches for her, his fingers grazing the side of her breast as he slips his arm around her back to tug her closer.

“Are you seriously going to lie to me?” he questions. “I haven’t forgotten the way you moaned when I pinned you face-down over that dresser.”

She scoffs but it’s weak. “That was in surprise.”

“You moan when you’re surprised, huh? And what sound do you make when you cum?”

Andromeda bites her lip. She’s moved closer to him, even if she doesn’t know it. The hellfire in her eyes flashes, and she seems to swell in his arms. Breathily, she says, “Changkyun…”

“Do we have a deal?” he prods, as much with his words as his fingertip along the underside of one of her tits.

“Fine, but the human is mine. Swear it.”

She lifts her hand, pricks her fingertip with one of her claws, and waits for the dark blood to bead before she offers it to Changkyun. He’s supposed to do the same, but instead, he brings her finger to his lips and suckles. Andromeda hisses, and he catches a glimpse of that forked tongue after all.

Fuck, he’s excited.

When he pulls her finger back, he returns to her gaze and says, “I swear.”

Those sunflower petal eyes have drooped with lust now as she waves her hand in an oval, and a black portal with swirling purple edges materializes.

“Step through,” she orders.

Changkyun hesitates. This could be a trick. She’s a demon, too, impossible to read, and she hungers as badly as he hungers, even if it’s for different things. He doesn’t know where the portal leads, and he has no insurance that she won’t close it behind him, but he supposes she’s thinking the same thing. In the end though, they’ve sealed a pact, and if it’s not fulfilled, whoever breaks it will be forced to repay it tenfold, so it’s enough security for him to step through.

It's dark here and warm, too. Feels just like home.

“Where are we?” he asks.

“My chamber,” she replies as she brushes past him toward the center of the room.

Changkyun wonders how many humans have filtered through here over the eons, assuming this is where she takes them in what they naively believe are simple dreams.

He looks around. It’s surprisingly personal for a demon’s room, well, he thinks anyway considering he’s never been in another’s. His own chamber is filled only with his bed, but Andromeda has pegs in the walls with amulets dangling from them and a table with bottles of colorful liquids. There are shelves, too, populated by all sorts of oddities, things he thinks he’s seen on Earth but never in their realm.

Maybe she doesn’t bring humans here. The thought excites him.

Andromeda catches him scoping her collection out, and she shrugs.

“My trophies,” she says.

She leaves it at that, and even if Changkyun wants to know more, he’s sure she won’t tell him.

She slips off her heels and lines them along the wall in a gesture that is so intimate, it stirs an ache somewhere deep in the hollow of his chest.

In an effort to underscore how unfazed he is by all this, Changkyun takes a seat on the bed since that is what this is all about, but instead of joining him, Andromeda surprises him again. Though they are never more comfortable than they are in darkness, the succubus lights candles around the room—and not with a snap of her fingers, as she easily could, but with a match. When she lights the last one near the headboard, she brings the match to her lips and, with a swift puff, snuffs the flame.

Every time he’s sure he knows where this is going, she reminds him that this is something more significant.

Changkyun is vibrating with anticipation.

“What?” she asks when she catches him appraising her with a cocked head.

He thinks about keeping it to himself, but he’s done enough of that over the years. Instead, he wets his lips before he confesses, “I’m curious about something.”

Andromeda scoffs. “Demons can’t be curious.”

“Hm, that’s true, or was anyway. Seems we’re both breaking our molds tonight…” he muses as he looks around her unusual room.

“What are you curious about?” she asks, and he laughs at his same emotion mirrored on her face.

“How do you entrance your humans?”

At this, her ample chest lifts a little. “You want to see?”

“Mm.”

Andromeda raises her eyebrows as a smile curls her lips. It’s unreasonably hot, and Changkyun feels the tip of his cock weep a little seed into his pants. It’s unexpected, and he shifts back on the bed to make his hunger a little less obvious in case this creature thinks she has any more control over him than he’s willing to give.

She brings a finger to her lips, and he watches the nail lengthen into a proper talon. The edge catches the candlelight and winks just before she licks it, and at last, Changkyun gets a full view of that forked tongue. It’s wider than a snake’s and just as agile, yet he can already feel it wrapping around his dick to taste every ridge.

When she’s ready, Andromeda approaches, her hips swinging like a bell, and Changkyun swears there’s music in his ears. She’s calling to him and his body answers.

He sits up ramrod straight, any hopes of tempering his eagerness long-forgotten. She stops just before his knees and looks down at him. Their eyes meet, and a little growl escapes his chest.

Her poor excuse for a dress has ridden so far up her bitable thighs that he can almost make out his prize nestled in the shadows at her apex. Normally, he would help himself, but he tries to put himself in the mind of a hapless human who would be too dumbfounded by her aura to do anything other than ogle shamelessly at her sexuality, and he thinks he’s doing a commendable job of playing lovestruck…

Slowly, the succubus descends, the apple of her ass settling side-saddle in Changkyun’s lap. His hands snake around her waist before he can tell himself to stop, and he holds her close to him.

He realizes in that moment that, demon or not, he is entranced, too.

For a second, Andromeda’s brow knits as she looks down at his arms around her, but when she looks back up, her sensual persona is back in full force. Her thumb pries at his bottom lip, and it puffs up in kind.

“Stick out your tongue,” she orders.

“Why?” he protests, “You can't feed off of me.”

“Don't be ridiculous. I don't want to feed from you. I want to use you.”

Changkyun simultaneously hates and loves this idea. He is used to using everyone and everything, but the way her petal eyes flutter warps the selfish streak within him momentarily. Besides, he tells himself, she may call this off if she doesn’t think she’s about to get what she wants out of it, and he hates that idea far more.

Andromeda takes his face between her hands and stares into his eyes until it feels like she’s wandering around inside him. Changkyun shivers for the first time in his eternal life.

“This is the part where I uncover all your darkest desires,” she says as the blackness in her eyes swirls.

The incubus falls into her gaze with the feeling that he is moving though he knows he’s not. Still, his arms tighten around her waist as dizziness overtakes him. He can feel her roving about in his head, but it isn’t long before she gives up with a hiss.

Changkyun smiles and then chuckles. “You can't find mine, can you, bright eyes? That’s because I’m nothing but dark desires.”

He trusts he sounds cocky and alluring, but he knows the truth is more than that. She can’t find any of his desires because he wants to explore all of them with her. Even he knows his brain’s a fucked-up mess over her.

Changkyun fans his hands over the keyholes of skin at the back of her dress and revels in the way she burns him. Demons naturally run hot, but she’s like fire incarnate. Fuck, what will she feel like when he’s inside her?

Andromeda pulls back and shakes it off though she doesn’t remove his hands, thank fuck.

“It doesn't matter,” she says after she clears her throat. “In a moment, you will have to do what I want anyway.”

“That so?”

“Yes, baby, it is so.”

The succubus bites her lip before she squeezes his cheeks between her fingers, and slowly, he parts his lips for her.

“Good little demon,” she says with a crooked grin.

Out lolls his tongue, and on the widest, flattest part, Andromeda presses the tip of her nail. Changkyun feels a prick that passes in an instant for a warm tingling that spreads quickly through his limbs. He feels heavy all over, too heavy to lift his arms or legs, too heavy to sit upright anymore. He falls back onto her bed, and she lays him out in an X shape, his hands to opposing corners.

At first, he is resentful. There was something about her sitting sweetly on his lap and in his arms, and even though she was above him, it felt like she was his and he held all the power over her. He wishes he was still holding her, but then that resentment fades as his other senses open up.

The sheets smell like her—a little fire, a little brimstone, and something less familiar that he can’t pinpoint, maybe animalic. Whatever it is, it stiffens his cock to unprecedented levels.

“Don’t worry,” says Andromeda as she stands beside the bed, “you’ll still feel everything. I’ll see to it.”

Her long fingers work at her waist to undo the belly chain there, and once it’s loose, she snaps it like a whip, and it lengthens with magic. In the candlelight, it glimmers as it puddles at her feet. With another flick of her hand, the chain encircles Changkyun’s wrists and threads itself through two heavy iron rings anchored in the wall. This sours his mood, less about the reinforcement and more about the fact that the rings are there at all because what other reason would there be to have them if someone wasn’t meant to be tied up to them in the first place?

“Aw, baby,” she coos, “don’t frown. I like it when you smile for me.”

His scowl deepens because now he thinks that’s a thing she says to everyone. Changkyun liked it better when he thought he was special. His jaw juts as he complains, “If I already can’t move, what’s the point of the chains?”

Andromeda shrugs. “Insurance. You’re a demon after all, so I don’t know how long you’ll be under my control, and I have big plans for you.”

At this, he raises an eyebrow. “Oh really?”

“Mm, yes. I’m going to suck what’s left of your soul right out of you.”

Changkyun can’t control much below his face, but he still feels everything acutely, and he definitely feels his insides quiver at the thought.

With her ensorcelled chain secured, Andromeda straightens. Her hands come to the back of her neck and lift the halter over her head. Her waterfall of hair slinks through the loop like thread through a needle’s eye, and it’s borderline hypnotic. His cat eyes narrow, transfixed to her breasts now as he waits for their reveal. He isn’t disappointed.

As the tight fabric is peeled away, her tits bounce out wild and free. They’re the most marvelous shape he’s ever seen, perfectly round with an enticing jiggle made even more tantalizing by the way her nails scrape along her sensitive flesh. Even from his pillow, he can see her nipples pucker so hard, they’re ringed by little pebbled haloes. Changkyun’s mouth is already watering.

For a moment, Andromeda takes them in her hands and lifts and squeezes before she lets go to give them a fresh, perky bounce that draws a little groan from the creature tethered to her bed. Smiling in self-satisfaction, she turns her back to him, which teases a frustrated sigh from him until she returns her hands to what’s left of the rumpled dress still suctioned to her waist. Changkyun knows what will happen next, and he finds himself straining what bits of him he can still control toward her.

Andromeda rolls the dress over her hips, slow and low so he can appreciate the swell of her firm ass until the fabric is taut over her most voluptuous curve, and then she bends over and does the cutest little shimmy to shake the garment to her pretty ankles. Changkyun realizes it’s silly to think her ankles are pretty, much less any part of her is pretty because “pretty” isn’t a word a demon uses, but he thinks it all the same until he discovers he’s still staring at her ankles instead of the lush cunt she is presenting.

He's only too happy to direct his attention to her damp lips which shimmer in the low light.

“Hm,” he muses. “For someone who didn’t want to fuck me, you sure are wet, little hellion.”

“Who says that’s because of you?” she challenges as she turns around. “I am a succubus.”

Andromeda presents her perfect form to him, and it’s clear her arousal has leaked down the crease of her thighs, too. She takes a finger and swipes it up her slit, twisting it this way and that so her wetness is unmistakable to him, and then she sucks her fingertip clean.

Breathlessly, Changkyun asks, “What do you taste like?”

Her smile is as wicked as she is. “Wouldn’t you like to know.”

He does. More than anything, he does.

One knee at a time, Andromeda sinks onto the bed, and his anticipation mounts. The leather of his pants is unbearably restrictive, and his cock is straining mightily against its repression, but with her blade-sharp nail, she cuts a line from collar to navel through his black tank and parts it instead. Her hands fan over his taut abs and defined chest, more appreciative than lustful honestly. He swells with pride, which only reminds him of his damn leather prison again.

Changkyun expects her to free him, but still, she does not. Instead, she swings a leg over his waist, her ass facing him, and takes a seat, her cunt pressed in a hot, wet kiss against his stomach. It’s all he can think about—her blazing heat throbbing against his muscles and making a mess of him—until the palm of her hand comes scorching across the tent in his pants.

Changkyun hisses. He would have bucked into her grip, too, if he could have, but for now, it’s the best he can do to show his succubus how much he appreciates her attention. Clearly, Andromeda gets the gist because her hand conforms around his tip, and he feels the extra pressure of her thumb against his sensitive cockhead in a blood-boiling way.

“You want me to play with you, Changkyun?” she asks sweetly over her shoulder.

“I want you to suck me off,” he demands and is infuriated to hear how quickly he’s lost his composure at just the hope. The rattle of his demonic growl darkens the edge of his words while it illuminates his impatience.

Even worse, Andromeda laughs lightly, a bit like a wind chime tinkling in a breeze. It’s too innocent for a sex demon, and it has his head doing funny, swimming things.

Despite her laugh though, she undoes the button at his pants and unzips the rest. He can feel both her hands at his waist, parting the leather gates, and something about that is unbearably sexy. Fuck, he’d give anything to see her face the moment she pulls his dick out because just the betrayal of her hitching breath is enough to make him blow.

Changkyun is an incubus. He was made to fuck—there’s no debating that—but he knows he’s got a special cock. He gets hard and stays hard for as long as he wants, and his cock, like her tits, is without compare. He’s thick, long, and adorned with a series of ridges along his shaft to coax delicious orgasm after delicious orgasm out of his partners, and he can’t wait until this creature falls apart for him.

If only she would stop teasing him!

Andromeda has both hands wrapped around Changkyun’s shaft, marveling at his girth and hardness in agonizingly slow strokes.

“It’s better than I imagined,” she murmurs, and just like that, new beads of milky cum seep from his mushroomed tip.

She’s imagined his cock in her hands…

Her thumb smears his early gift, and as she looks over her shoulder at him, she pops it into her mouth. If Changkyun could pull his chains, he’d have already broken out of them.

“So bad,” he whispers.

“Mm-hm.”

“I want you to be badder,” he eggs on, and Andromeda smiles.

“What sort of bad things do you want from me, baby? I'm not short on sin.”

She’s sure as shit not. Now it’s just a matter of selecting the order.

Changkyun muses. “Swallow my cock. Choke on it.”

There’s that devilish grin, and he can’t believe his luck. He’s the one tied up, but he’s still calling all the shots. It’s exactly what he—

But instead of doing as instructed, Andromeda slides her pussy up his stomach, then his chest, leaving a sopping wet trail until Changkyun can feel the cloying heat off her seam colliding with his chin.

“Earn it,” the succubus says, and his arrogance evaporates.

At first, Changkyun is irritated. He wants what he wants when he wants it, and right now, he wants his dick buried down her throat, but he is also an opportunist, and this is an opportunity to show her that no puny human entrée will ever please her again the way he will. He’s going to relish making Andromeda an unexpected slave to his cock.

Her tongue may be forked, but his is long and skilled, especially trespassing into forbidden velvet walls, and it never fails to send his human partners spiraling into orgasms so violent that he almost fills up on their first one. His succubus may have him dead to rights for the moment, but it doesn’t matter if he’s frozen in chains—Changkyun’s going to have her quaking for him.

He wets his lips in anticipation as Andromeda sinks back. Her scent is most intense here, musky and raw and demanding his full attention. Her puffy lips eclipse his view, and he is face-to-face at last with the secret she can no longer hide.

She craves him as much as he craves her, demon or not.

Every human tastes different—Changkyun should know; he’s fed on countless numbers of them. Some are tangy, others sweet or even sour, while still others may taste fresh or filthy, but there’s also a distinctly human quality to all of them, an inadequacy. He has never put his finger on what that is, but all he knows is that when his tongue darts out to take his first taste of succubus, he understands that nothing will ever taste as delicious ever again. It is indefinable, but it is also unforgettable.

Andromeda is demon heroin. With one lick, he knows he will never be able to stop searching for the next one, and he realizes in one fell swoop that she has done to him exactly what he has planned to do to her. To stop tasting her feels unconscionable. She must be devoured until she begs him to stop. No wonder so many humans go mad after being with a succubus. A person couldn’t move on from this. Changkyun can’t move on from this. Maybe this is the reason demons don’t fuck demons. What a fool he’s been.

At least if he’s going to be ruined, he’ll see to it that she is, too.

He showers his attention along her seam first. He likes to prime his meals this way, get them all worked up and squirming and hoping against hope that he’ll suddenly change his mind and fuck them on his tongue like they need, but he won’t. It’s not until they’ve given up that hope that he will plunge his tongue inside to send them into an unparalleled climax.

But as has been the case all night, things have not gone the way he expected. He's barely had a chance to savor Andromeda’s exquisite moans before he’s eager to show her what else he can do. It would be easier if he had use of his hands, but Changkyun is determined to prove his prowess to her regardless. His tongue slides between her folds and teases an intense groan from her.

Andromeda rocks her hips back onto his chin, and his tongue delves a little deeper into her richness. As much as he wants to go to town devouring her, he knows the true payoff comes with the foreplay. He spends time roving about her soft shadows, tasting her desire and circling her entrance without ever penetrating her.

He’s purposefully neglecting her clit, and it’s clearly infuriating her. She keeps grinding back, trying to force him where she needs him, but he’s enjoying the game too much.

Until she starts playing one of her own.

Like a kitten, she licks his tip. Pleasure skyrockets through Changkyun’s body. If he could move, he would be writhing head to toe.

“Shit!” he shouts, his head thumping back to the bed.

“I thought I told you, don’t be a bastard,” Andromeda adds far too gently for her meaning.

“Yeah, well, I don’t want to rush with you.”

Changkyun wishes he hadn’t said anything. The way she stares back at him makes him feel like something other than what he’s supposed to be—a mindless sex demon.

She opens her mouth to respond, but he doesn’t want to hear it, so instead, he does as she asks and dives into her. He works double-time between her swollen lips, lapping at her obscenity and pressing experimentally into her warm cavern. Her nails dig into his thighs, and whatever cutting thing she might have said is traded for a whiny moan.

He’s still ignoring her clit for now, but it’s hard for her to complain with his incubus tongue now deep inside her. He plunges the thick, serpentine muscle into her shivering walls, and she keens long and low into her room.

Changkyun withdraws, her body slumping instantly at the loss, just long enough to say smugly, “Can your human playthings do that?”

Andromeda doesn’t even have a chance to answer before he invades her core again and undulates the thick appendage as only an incubus can. He knows just by texture where her most sensitive recesses are, and the tip of his tongue targets them with wicked precision.

She howls as her hand squeezes his base. Changkyun might have protested about how hard she was gripping him, but, frankly, it’s keeping him from blowing his load at the feeling of her pussy constricting his tongue.

It’s time at last.

Changkyun draws his tongue back into his mouth to savor her sumptuous taste, but it isn’t just his succubus’s ample wetness that revs him up to unprecedented levels; it’s how hard her clit is. With one flick of his tongue, Andromeda’s thighs shake around his ears. She makes a sound he’s never heard before, high and sweet and innocent like a dove’s coo. Something like that shouldn’t come out of a sex demon either, so it only makes him madder with lust.

She stifles herself by engulfing his cock, and even though that was what Changkyun had wanted all along, he’s a little disappointed. He didn’t realize how much pleasure he was getting from her sexy, desperate noises until she’s taken them away from him.

At least he can enjoy the way Andromeda chokes around his thick member. Her mouth is far deeper and lacks the pitiful gag reflex of a human, but that doesn’t lessen the sweet, filthy symphony of his cock drenched in her saliva. It’s messy and depraved, just the way Changkyun likes. The fork in her tongue cradles his shaft so nicely, especially when she gets to his tip and massages it until it leaks more precum. He just wishes he could see those petal eyes go wide as he splits apart those flushed lips.

“Tastes good, doesn’t it, little hellion?” he teases, and she mumbles an “mm-hm” around his shaft.

Changkyun smiles and returns to that cute caramel button throbbing for his attention. His tongue wraps around her clit and tugs it between his lips so he can suck properly. In no time at all, Andromeda is gagging her scream around his length as a rush of her cum drenches his lips and chin. Her thighs box his ears so hard they ring, and she collapses on him, his dick still twitching between her limp lips.

She doesn’t need to tell him it’s the best orgasm she’s ever had; he knows. But Changkyun still wants to hear it.

“See?” he prompts. “I can be generous when motivated.”

Andromeda rolls off of him with a groan and says, “I suppose you’ll be wanting your half of the bargain then?”

Her hand is pumping his base now, and the electricity gathering there has Changkyun’s toes curling.

“Is that what you’d do with a human?” he asks.

“Yes.”

“Then do something else.”

“You don’t like it?” she pouts. She’s between his legs now, crouched like a submissive little lamb with his cock cradled between both of her hands, and even though he knows that’s the furthest thing from the truth, if Changkyun had a heart, it would be pounding at the sight.

He wets his bottom lip and stares at her. “Do something just for me.”

Andromeda’s mouth falls open. Something changes in her. It’s subtle, but he sees it. Maybe that’s because she’s been imprinted on his brain for 700 years, so he notices when she looks like anything other than the Queen of Hell, but she’s definitely different. Her eyes turn downward as her full brows pinch in the middle. Her hands fall away from his cock so she is on all fours while her gaze stays fixed to his.

She crawls up his body this time, her skin gliding along his oiled with their sweat. She stops when they are face to face. Her knees are pinned on either side of his hips, and her cunt presses on his shaft, dripping shamelessly with intention.

Changkyun waits. He’s not sure what the succubus will do with his request, but the way she is looking at him has his blood pumping. She must feel it throbbing through his cock, too, because she grinds herself along him with a purr. The chains creak as his fingers flex.

“Something just for you…” Andromeda whispers, leaning down so he can feel her words ghosting along his lips.

She kisses him then, and color bursts behind his eyes. In another seven centuries, Changkyun would have never guessed that this is what she would do, but the touch of her lips is euphoric. He’s never kissed nor has he ever been kissed—that’s not in the incubus playbook.

Neither of them really seem to know how to move their lips across each other’s, yet as the initial shock wears off and they grow more confident, they find a rhythm that has his chest tightening in unexpected ways. When Andromeda’s tongue pushes between his lips, he arches underneath her and bucks, his cock sliding between her folds almost as deliciously as his tongue slides along hers.

Through heavy panting, she lifts from his mouth. Her eyes dart around his face, and her flushed lips purse beneath her pinched brow. “Did that please you?”

Changkyun unleashes his demon growl, and with one good yank, he rips the chains free from the hooks. Her eyes go wide, but before she can respond, he has her cheeks between his hands, and he’s kissing her again.

Now that Andromeda is distracted, he rolls her underneath him and ruts against her the way he wants—recklessly, wildly, hungrily—until his dick is soaked and ready to fuck like it’s never fucked before. She whimpers into his mouth, her forked tongue tangling with his dexterous one in ways that saturate his mind with white hot desire.

She barely notices when he reverses the chain around his wrists and loops it around hers in a fresh demonic bond, but she stills once she hears the metal loop through the wall hooks and pull her arms taut.

Andromeda stares up at him in shock.

“You were right to worry,” the incubus says with a sly grin. “Your venom wore off.”

“What happens now?” she asks breathlessly.

Changkyun pretends to think, but he’s been thinking about this forever. He smiles. “I fuck you until you beg me to stop.”

He smirks as he devours Andromeda’s manacled, squirming form. This little minx has no idea what’s in store for her.

“But first things first,” he says, and he enjoys the way her face falls. “I’ve got a messy cock, and you have such immaculate tits. Let’s fix that.”

Changkyun wastes no more time before sucking one of her nipples between his teeth. His canines are sharp, but he stays gentle except for the few experimental nibbles that spur her pussy into frenzied buckings against his shaft. After all the teasing, he’s close to release, but he has bigger plans for his first load of cum.

He lavishes attention on her second tit now and, much to his infinite delight, receives a no-less greedy response. With both nipples as high and proud as they can go, Changkyun sits back and straddles Andromeda’s stomach.

She’s confused. From the frenzy between her thighs, she had thought she was about to be railed through her bed, but now she’s staring down the barrel of his red-hot cock. The head is glistening with his and her cum, and she licks her lips.

“Tongue out,” he demands. “Keep it out.”

The long, rouged muscle unfurls, the fork curling like beckoning fingers. Damn her.

Furious at the shiver of weakness that heaves through him, Changkyun manhandles her tits together to create a supple crease that’s all too welcoming. He pushes his dick forward, and softness surrounds him. It feels too sinful, and he moans, which only intensifies when he realizes her tongue can reach his tip.

Andromeda greets his every thrust like this, and in an embarrassingly short amount of time, Changkyun cums. His release splatters the crest of her tits, all the way up her throat, and spurts onto her jaw and chin.

The succubus grins in victory, but he has to wait until his toes uncurl before he can be pissed about it. A tremor of passing ecstasy moves through him before he crashes against the wall to watch her lick up what seed she can reach.

“Shit, yes,” he groans as his head thunks against the lava rock.

“Feel better?” she asks.

“Yeah.”

“Are we done then?”

Changkyun looks at her with one eyebrow raised. Andromeda smiles, and he imagines he sees a bit of relief there.

“Fine,” she says, “but remember what I said.”

How could he forget?

You’ll never deliver.

This is the opening he’s been waiting centuries for. With her body pliant and her eyes defiant, Changkyun is reinvigorated. She’s sexy and taunting and red-blood demon through and through. His determination galvanizes.

“I’m going to teach you how to properly fuck my cock,” he says as he slaps her thighs apart and gets an eyeful of her waiting cunt.

Andromeda bares her teeth at him. “I’m a succubus. I think I know what I’m doing.”

“No, not one of those meager human excuses for dicks. My cock, little hellion. If you don’t fuck incubi, then you don’t know how to take it.”

“Oh, and your humans can?”

Changkyun pinches her chin between his fingers and ensures her eyes meet his before his voice drops perilously low. “I don’t give them everything. You? You’re going to get it all, absolutely every last bit I can bury in you.”

Andromeda rattles her chains, and her tits bounce so invitingly that he’s hard as diamonds.

He looks at the last pennants of pearl festooning her clavicle just out of reach of that naughty tongue, and the strangeness he’s felt building all night in his chest loosens its grip a little. This is demon fucking, and it comforts Changkyun. This is what this was always supposed to be about, not that strangely sensual shit they’d been doing for no discernible reason. Just a good, old-fashioned feral fuckfest. He looks forward to wrecking that tight pussy the same way.

Only that’s not what happens.

For reasons he can’t understand, once he has primed himself anew with his hand at the visual of his succubus fidgeting beneath him, he slips between her legs and lines his member with her pulsing entrance, but he doesn’t plunge in to the hilt and relentlessly fuck her.

Instead, Changkyun nestles his cockhead just inside her, savoring the way she whimpers with delight. There she goes, making those unprecedented sounds again. It empowers him as much as it weakens him. Her slit strangles the neck of his cock, and it’s so mesmerizing, he spends a few long minutes just fucking her hole.

In. Out. In. Out. A little faster but no deeper.

Andromeda never put her tongue away. It’s lolling in the corner of her mouth as her lids lower like blinds. She’s drunk on his cock, and Changkyun wants to howl with triumph.

“Where’s the mighty Hellion of Hades now?” he taunts, but her answer surprises him.

Her eyes dim and her body slackens as she babbles, “Yours. Yours. Just do what you want to me. Yours, Changkyun.”

He freezes inside her.

Changkyun is just like any other demon—selfish, self-absorbed, and possessive—but he’s never actually owned anything. Even his room is a mere waystation between his last feeding and his next round of chaos. But now the only other creature he’s thought about in ages has given herself to him. He doesn’t know what to do with that.

So he pushes all the way in. Slowly. And then he stays, engulfed by her relentless heat and her scent.

Andromeda arches underneath him and cries. “So full of you! So full…”

He leans over her, his body casting gauzy shadows on her in the flimsy candlelight. He brushes her hair from her face. He tells himself it’s so he can better watch the way his cock ruins her, but that’s a lie. He just wants to watch her.

Changkyun withdraws slowly, savoring the way her cunt makes needy, squelching sounds as it begs to keep him, and then he drives back in. He keeps his pace rhythmic: emphatic thrusts followed by languorous retreats. He savors her—too much…

His mouth descends to hers, and now he’s fucking and kissing like some sort of… human.

It’s wrong. It’s not supposed to happen, not for a creature like him, but he can’t stop himself, and he’s certainly not going to stop her when her tongue glosses against his in a way that makes him a little disoriented.

Changkyun flops on top of her, and she makes a little “oompf” into his mouth before her legs lock above his ass. She may be trapped, but so now is he. Instantly, it spurs his cock faster.

Between their frenzied panting and their sticky bodies, it’s getting noisier by the second. He pushes up again so he can truly appreciate how shamelessly she responds to him. He watches his demon cock spread her wide and stir her hips up with voracious little lunges as her body yearns to take him all every thrust.

“Changkyun…” she moans, and it’s so heady that he forgets himself.

His hand cups her jaw, his thumb pressing lightly on her throat. She’s staring up at him with eyes of fire, her mouth open and her lips swollen to the point of vulgarity.

“Andromeda…” he echoes.

She’s so pretty, but he’s missing something. It’s a thing he can’t pinpoint, but all the same, he knows he needs it. He heeds to his usual impulsiveness and offers, “I’ll remove the chains under one condition.”

“Fuck, name it,” she whines.

“You ride me until I cum.”

She smiles lopsidedly paired with heavy lidded eyes. “Yes, yes, yes.”

Changkyun releases the enchantment on the chains, and they fall limp to the bed like the innocent accessory they’d once been. Andromeda’s hands are on him in an instant, wrapping around his neck and crushing his body to hers.

They kiss so hard that he may not have noticed her rolling him onto his back again if it isn’t for the fact that his dick is unexpectedly cold now that he’s slipped out of her. But when they break free, he sees her above him as he’d always hoped. Dark waves of hair rush over her shoulders and tickle his stomach in a way that stirs something foreign and fluttery inside. Maybe he’s got some kind of demonic parasite—who the fuck knows? But Changkyun doesn’t have time to care about that now because Andromeda moves back and wraps her hand around his cock to hold him in place as she sinks back down.

“Oh, fuck,” he moans.

This is different. He’s enveloped in tight, hot velvet. It’s all-consuming. With her controlling her descent, Changkyun can appreciate how much he opens her up. No human could take him like this—at least, not as he truly is. He scales back for them, but not for his succubus. Her walls hug his every inch, and she whines gratefully for it all.

When their sexes meet, she rocks back in his saddle, and he catches the ripple through her taut stomach. It’s too much. He’s ready to blow before their next round of fun has even started. That won’t do.

Changkyun has to distract himself, and lucky for him, her lean-back has presented him with easy access to her pretty, arousal-studded clit. His thumb finds a home there, pressing at first to garner her full attention and, once he has it, rubbing it to its full perky height while Andromeda shakes around him.

She savors his thumb for a minute before she lifts up, and he gets a slow-motion pornographic shot of his drenched cock splitting her wide before she sits back down with force. Shockwaves tear through the both of them.

“Do it again,” Changkyun orders, but he knows it sounds like begging instead.

But Andromeda complies, not once or twice but over and over again. It’s mesmerizing the way she fucks him, and it feels even more divine, which is another word a demon doesn’t use, but fuck if it isn’t true about her perfect cunt.

At last, she sits full against him and switches to a grind, and Changkyun can feel the way he stirs her walls, especially one spot just inside her belly that, when she gyrates just right, ensures she spouts a string of curse words every time. He pockets that knowledge for later and lets her finish working them both into a frenzy. The closer she gets to cumming again, the tighter she squeezes him, and it’s hot as fuck.

They’re feeding off each other, but not in the way either of them are used to. In fact, Changkyun can’t explain what he’s getting out of this at all. It’s fucking, but normally, when he fucks, he fills up, like a human stuffing its face at a buffet. With Andromeda, he feels like he’s being emptied, and what is left is raw and confusing. It reminds him he’s naked though he’s never cared whether he’s naked or not before because that’s just part of what an incubus is. But he cares that he’s naked with her. He cares how he looks to her eyes. He cares that she wants to see him—clothed or not.

He cares.

Demons don’t care.

“Fuck, Changkyun, I don’t want to stop,” she calls from his lap. “I don’t want to ever stop.”

Her hands have hiked up her hair in a gossamer fountain as she rides him, each bounce resonating in her tits. Her mouth hangs open to accommodate her ceaseless cries and moans. There’s a sheen of sweat dappling her body that magnifies the hybrid of iridescent little scales woven in with her skin.

“Not yet!” she begs, but it’s all over for her.

Andromeda gushes around his cock with a tremendous climax that ripples through him. Her cunt is strangling the life out of him, and Changkyun cannot get enough. He punches his dick deeper into her, which sends a wail from her lips. She pitches forward, hands crashing to his shoulders and digging in until they break the skin.

“More,” he grunts through the suffocating pillow of her tits in his face. “Give me more.”

He’s fucking her at ultrasonic speed, his hips jackhammering up into her and crashing against her swollen clit. His ridges stimulate every nerve in her greedy walls as they continue to seize around him.

Her eyes roll back in that cock-drunk face of hers as she babbles out senseless noises and a reedy “Not again…”

But Changkyun’s fucked her straight through one release into another, and this time she screams at the top of her lungs. Her body goes limp atop him, a beautiful doll for him to use for his own end at long last.

His hands stay on her hips to hold her down, but just as he regained his mobility faster than she expected, so does Andromeda. She perks up on his chest and sits back in his lap. It’s pure bliss, being inexorably swallowed by her dripping pussy with no chance of escape. This is exactly how he wants to unload inside her, with her cunt—his, now—milking him for every drop of his demon seed.

Changkyun scoops his hands under her ass to lift her up so his can piston into her. It won’t take much. He’s had a hair trigger all night anyway, and she’s still convulsing with aftershocks of her release. But right as he’s about to blow, he feels her pull up, and he knows what she’s trying to do, especially because she’s smirking.

“We had a deal, hellion!”

Before Andromeda can respond, her chain encircles her waist with whip-like speed, both ends in Changkyun’s fists as he secures her in his lap.

“Take my cum,” he snarls just before he floods her pussy.

This is different than his first climax. This means something. There’s no pretending anymore. He’s…

Happy?

It feels like there’s something lodged in his throat as he stares up at her. Her eyes are closed, her face relaxed, and her hands are pressed on the softest part of her belly where he shelters.

She whispers his name, and the chain slackens in his hands as Andromeda falls on top of him. Instinctively, his arms go around her, and he holds her little ball-shaped form tightly against him.

They pant together as they come down from their highs, and once he’s cleared his throat enough to talk again, Changkyun grumbles, “You were going to leave me?”

“I was going to suck you off,” she assures, but Changkyun doesn’t like the weird feeling lingering in his question. Still, he forgets it when she adds, “But this was better.”

“This was better,” he agrees and presses his softening shaft a little deeper into their mess.

After a while, Andromeda rolls beside him, her hands on her belly again as she stares at the ceiling. “I wonder if all incubi are like this.”

“Don't even think about it,” he snaps, and his words carry the full breadth of his demonic bite. “All of them would disappoint you. The only one you want is me.”

Changkyun doesn’t like the insinuation that she might try others. He comforts himself by reminding himself that demons, by nature, are possessive, but this doesn’t feel like possession. It feels like fear.

Andromeda raises an eyebrow at his jutting chin and taut lips, but says, “Okay. Just you.”

His shoulders relax though he finds his hand has wandered over to join hers on her stomach.

“I don’t even remember what started this,” she muses.

“We were trying to feed from the same human.”

“Oh,” she laughs. “Yeah, now I remember. I forgot I was hungry.”

Changkyun doesn’t reply except with a rhythmic stroke of his thumb over hers.

“You know what?” she says. “I think I worked up a fresh appetite though, and I’m in an unusually generous mood. Why don’t we just share her?”

“Share?”

The word is foreign, but he likes it because it means he’s not the only one here thinking things he shouldn’t.

“Only if you want to,” she adds softly.

“Yeah, okay.”

Andromeda props up onto her arm, a smile on her face. “Okay?”

Changkyun nods. He’s smiling, too.

It’s going to be hard to focus on the human with his succubus in the same room, but it’s in that moment that he realizes he’ll try anything Andromeda asks of him as long as it means she’ll keep him around a little longer.

The succubus hops off the bed and bothers only with her chain around her waist before she creates a portal back into the human’s bedroom. She steps through the glowing oval and offers her hand back to him.

Changkyun thinks this is what a human might call a date, but he’s not human, so he calls it what it should be: an unholy alliance. But as he slips his hand into hers and she pulls him through to her giddy kiss, he realizes maybe when it comes to her, there’s room for a few more words in his lexicon.

#monsta x smut #changkyun smut #im smut #oneshot #rivals to lovers #october vibes #present tense strikes back

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