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captainthisshipinmyhead · 2 months

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Secret Desires

Sanemi x Fem!Reader, Giyuu x Fem!Reader (p sure I used she/her pronouns at one point but I don't think I use any descriptors really, so it could be read as GN!Reader, just wanted to tag as fem just in case)

Shinazugawa hates Tomioka, everyone knows this. But nobody knows the real reason behind this animosity-- or that it mostly has to do with you.

Warnings: angst, mentions of sex (no smut), OOC Sanemi tbh, cold/emotionless Giyuu (I put that as a warning bc it pains me. Giyuu is my lil cinnamon bun sweetie I hate making him that way 😔), very little plot outside the romance stuff lol.

WC: 5,182

A/N: I'm not rlly a huge fan of like, music-based fics but I have to admit I thought about the idea for this one when a Panic! At the Disco song came on shuffle the other day. These lines listed below in particular from "She Had the World" inspired this. Enjoy. As always, constructive criticism is much appreciated but please be kind.

“When I look in her eyes, well I just see the sky”

“I don’t love you, I’m just passing the time”

It was no secret to any of the hashira that Shinazugawa hated Tomioka with a passion. To the few of them that had asked about this animosity outright Shinazugawa had given some lame answers before, like that Tomioka appeared to think of himself as better than the other hashira (true), that Tomioka had defeated him in all their 1v1 training sessions due to some really bullshit happenings that occurred each time and it was annoying (true), and that Tomioka had killed one of Shinazugawa’s pet beetles (not true). Though these were the reasons he gave for having such a hatred for the Water Pillar, they weren’t the real reason why Shinazugawa couldn’t stand the guy. The real reason that he would probably never reveal out loud to anyone else was simple: you.

You were indeed the reason for the one-sided hatred between the two hashira. You didn’t know this, of course, but Shinazugawa absolutely couldn’t stand the fact that Tomioka had you. Though he never intended on telling you this, Shinazugawa had feelings for you. Deep, deep feelings that he actively had to push down when you talked to him with your bright smile, telling him another one of your stories about the crazy happenings of your day. He was no stranger to envy and not getting things that he wanted in life, so it wasn’t just the fact that Tomioka had you, but that he didn’t care for you as he should.

This was another secret Sanemi held closely-- not because he didn’t want to tell you, but because didn’t know how. He had found out Tomioka’s true feelings because Tomioka had gotten careless after one stressful week with back to back missions and left his personal notebook out in a common dining space. The only person around at the time to find it was Shinazugawa. He normally wouldn’t care about the personal musings of a random person but given whose notebook it was, he couldn’t resist reading a few tidbits. His jaw fell open in rage when he saw the way Tomioka had written about you there—not necessarily as if he didn’t care for you at all, but he was very clear in the fact that he had no romantic feelings toward you whatsoever. He was very clear in his musings that you were his partner simply as a way for Tomioka to relieve stress, seek out affection, and boost his own ego.

When Shinezugawa read this, he was beyond pissed. He was absolutely outraged. How could he? How was it that Tomioka of all people got to have someone as kind as you and he didn’t value you the way that he should? He could’ve killed Tomioka with his bare hands in that moment, but he knew that you were at his estate now, visiting your partner for the evening, and he knew that you hated unnecessary violence and animosity between fellow demon slayers. In the moment, he decided to place the notebook back where he had found it, and go on a walk to calm his anger. He would deal with Tomioka in due time, some way that wouldn’t have you angry at the both of them.

In the weeks following this discovery, Sanemi could not shake the rage that filled him at the sight of Tomioka. And don’t get him started on how it felt seeing the both of you together. When you approached Sanemi alone, which you often did as you enjoyed talking to the typically prickly Wind Pillar, he forced his emotions down so that he didn’t burst forth with the knowledge he had on your little boyfriend. You absolutely deserved to know, but if he were to be the one to tell you he wanted to do it without anger, only with empathy and understanding. The way that you should be treated. Sanemi valued you deeply, and he never wanted to hurt you. It was his own deep-rooted care for you that made this situation so anguishing. He knew that he could treat you better—so much better. If only he had gotten closer to you first, then maybe....

He tried not to linger on the maybes. He didn’t want to be your friend with any conditions attached—he never thought of himself as the most emotionally intelligent person, but he at least knew that wasn’t fair. So he let it play out, because although Sanemi didn’t necessarily believe in karma, he did believe that the truth always comes to light.

As far as your relationship went, you were comfortable in it. While there were things that maybe had you desiring more, you couldn’t say that you weren’t content with Tomioka so that was good enough for you. Really, what more could you ask for? Your boyfriend was strong, handsome, perceptive to your needs, and your intimacy together was consistent. Sure, Tomioka wasn’t the most outspoken about your relationship or on board with PDA—or, when you thought about it, any kind of physical affection-- but you really didn’t have any complaints. I mean, is your relationship really in the trenches if your boyfriend doesn’t show you off? No, that wasn’t necessarily a deal breaker.

But when you saw other couples together, you felt an ache in your chest. You couldn’t help but compare your relationship to the sugary sweet ones around you. You saw others who held hands on public pathways, fingers intertwined, and imagined what it must feel like to be in love so freely where everyone could see. You saw the way these couples would sneak pecks on each others’ cheeks or foreheads, and the way that they would blush at the acts of affection, and you sighed internally. You heard whispered vows of devotion and love, and couldn’t help but think about how Tomioka never professed his love to you. Not verbally at least. I mean, he had to love you of course, you two had been together for the better part of a year. He just didn’t show it that often. He was just subtle. That’s what you told yourself. You had muttered the three words to him before, but you usually only did it in moments of passion, when you could play it off as being really into the moment if he questioned it. He didn’t, but all you got in response to your proclamations were grunts in your ear or hums that you hoped were agreement. But honestly, not hearing those words from him hurt your feelings. You wanted a deep love; one that your mind never questioned because it was always made so clear to you how much you were valued. You wanted it so badly you dreamed of it, but you weren’t willing to end things with Tomioka just over feeling a little pathetic at not publicly being affectionate with him or hearing three words. Other than those desires of yours, you guys were perfectly fine, really.

It only took about a month before the guilt and rage began chipping away at Sanemi’s resolve. He had to tell someone, even if it couldn’t be you—and Iguro was the only hashira Sanemi trusted with any tidbits of his personal life, so Iguro it was.

He had invited the Serpent Hashira over for a training session one afternoon when he was particularly frustrated. Iguro pretty much knew the drill; when Shinazugawa invited him over for one-on-one training it usually meant he needed to rant about something and let off some steam. Since Iguro was more of the quiet type anyway, he didn’t mind keeping quiet and letting Shinazugawa grunt out his frustrations.

Sanemi may have thought that he was keeping his admiration for you a secret, but Iguro was much more perceptive than the Wind Pillar realized. When he finished telling his friend how shitty your relationship really was, he was shocked that his friend called him out instead of getting angry with him.

“And you didn’t tell her this?” Iguro admonished Sanemi, “You’d keep such a secret from the girl you love?”

“I...what? Love? I didn’t say anything-“ He cut himself off at the sharp look in Iguro’s eyes as he tried to deny his feelings.

“I can’t tell her, obviously! She would be angry not only at the situation but at me, for knowing now for a month that her relationship is a sham! You can’t just....just drop that on someone! I mean, did I even ask for your opinion anyway? Geez!”

Iguro’s eyes peered sternly at Shinazugawa over his bandages. “You should have told her as soon as you knew. It wouldn’t have been easy, but it would have been easier than telling her now. Maybe she wouldn’t have been angry then, but she definitely will be now that you’ve known all this time, and you can’t blame her.” Iguro would never admit it, but he had grown fond of you over your time with the Demon Corps, and it was mostly contributed to how highly Shinazugawa, his friend, spoke of you. This whole situation now pissed him off as well.

Sanemi found that he couldn’t meet his friend’s eyes.

“You think I don’t know that?! Know it all ass....” Sanemi mumbled, deflecting the shame he felt at being called out. “Look, whatever, I’ll tell her soon. I said already I should’ve told her before. God, this sucks.”

Iguro nodded in the affirmative, sheathed his sword and bid goodbye to his friend before heading back to his own estate, trusting that their training session had been helpful. And it turned out that it had been helpful, as it struck Sanemi to be called out so plainly by his typically cold friend, who he had not expected to scold him at their training earlier. I mean, what was that about? Iguro never spoke up when Sanemi ranted—it was like, an unspoken understanding of theirs. But hey, whatever. The longer Shinazugawa got to ponder on the oddity of the earlier conversation, the less he thought about what he was on his way to do.

Sanemi approached the residence of the Flame Pillar, who you were training under as his tsuguko. His steps faltered a bit as he saw that you were already outside and you spotted him quickly, giving him no more time to prepare his words. He forced a smile on his face that he hoped matched yours, and closed the distance between you.

“Y/n! Hey, how are you doing today?” He started out with some niceties, stalling.

“Oh well, I’m pretty good, Sanemi, how about you? I see you’re kind of flushed, if you need to come inside we can. It’s pretty hot out today. Here, let me get you some water as well!” As kind as always, you took him gently by the elbow and began walking him to the engawa nearby. As he was seated, he rubbed his sweaty palms on his pants. Gratefully accepting the water you held out to him, he drank deeply and sighed, knowing that the painful conversation had to begin.

“Y/n, I um... I came here to tell you something. I should’ve told you a long time ago, but I have been a coward, and I’m sorry for that.” He glanced sideways at your face, noticing already how the worry filled your eyes.

“About a month ago, I found some personal writings of Tomioka’s, and, well, they... they mentioned you, and...” He paused to take a deep breath, preparing to rip the metaphorical bandaid off. “He wrote in his notebook that he isn’t in love you”

Sanemi held his breath. It almost seemed in that moment as if the world held its breath too—he could feel a slight breeze but didn’t hear it move through the trees, and even birds that had been chirping had fallen silent. He forced himself to look at you and he immediately wished he hadn’t. Your mouth had fallen open in a delicate “o” shape, and your eyes sparkled with tears that had yet to fall. It appeared that you were trembling, and you couldn’t meet his eyes as they desperately tried to lock onto yours.

After a few moments of prolonged silence, Shinazugawa reached his hand out toward you, not knowing what to say but knowing he could offer you some physical comfort—and you jerked violently away from him.

“Go.” Your voice was low.

“Y- Y/n I’m—”

“I said go Shinazugawa,” you were practically growling at him.

“But wait, I-“

Your head whipped around so quickly he was startled, your expression as fierce as when you faced down a demon. “You knew. You knew for a month and you hid it from me. I thought we were friends, I- I thought that you cared for me!” The anger in your voice is exactly as he had feared.

He was going to lose you because of Tomioka—no, no.... he was going to lose you because of his own stupidity.

Not wanting to anger you further, he slipped down from the engawa and took a couple of steps away before speaking one last sentiment to you: “I am sorry, Y/n. I understand if you don’t wish to talk to me anymore, but my door is open to you if you ever change your mind.” He exited the estate and walked with a heavy heart back to his own mansion.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

You were devastated. Your deep fear had been confirmed by your friend, who had known long before you and chosen to deceive you. You had ignored Giyuu’s letters asking to meet for meals, and you had asked Rengoku to turn him away whenever he showed up at the estate’s entrance. You sobbed for a couple of days straight, then you could only lie in silence for the next day or two. Rengoku, the kind hearted man that he is, brought you all your favorite foods at mealtimes to try to entice you to eat, but your appetite was nonexistent despite his efforts. You finally reached a point where your sadness turned again to anger, but this time it was rightfully aimed toward the person who had deceived you longer than anyone—Giyuu. You finally instructed Rengoku to let him in after 5 days straight of the Water Hashira groveling outside. Rengoku, bless him, glared at Tomioka the entire time he marched to your door, though he knew not what was going on between the two of you.

You had made an effort to clean your appearance up; you didn’t want to be disheveled in front of the man who had ripped your heart to shreds. Tomioka began the conversation, immediately starting to apologize, knowing how you had found out because Shinazugawa and Iguro had already ripped him a new one for it.

“Y/n please, I’m so so sorry. I can’t apologize enough for-“

“How could you?” You cut him off, not wanting to hear his bullshit apologies. If he were really sorry or guilty or whatever he would claim to you, why would he have kept his act up so long? Why pretend to care for you at all? If he wanted sex, it could have just been that. People make arrangements for situations to just enjoy sex all the time, there could have been some sort of understanding between you without the need for this senselessly cruel pain that you were put through.

“Y/n, I... I messed up. I was selfish, and I began a relationship with you knowing that a serious relationship wasn’t what I wanted, and I just.... I just hoped that somewhere along the line I would change my mind. I need you to understand though that it has nothing to do with you, you’re the best person I know, I just... I’m not someone who’s able to date right now. I don’t know if I’ll be able to ever, it’s just how I am. I should have told you that. I made excuse after excuse not to break things off. I enjoyed your affection and your attention, and I took advantage of it. I’m sorry.”

You listened to his small speech with a quivering lip. He dated you for almost a year, with you thinking that you two were serious about each other, just because he liked your affection? You were almost more angry now that you’d heard his stupid explanation; it didn’t excuse this sham of a relationship. The silence stretched on as your tear-filled eyes glanced at the ground, at the trees behind him, at the birds in the sky....anywhere but at him, the man you thought you loved. Eventually, he broke the silence.

“You’re right to be angry. I would be too, anyone would be. You deserve better than me wasting your time. I’m so sorry. I know I never told you I loved you, because that felt like a lie, and I know you probably feel used. But y/n, if you ever forgive me, I know I could love you as my friend. I could be a much better friend to you than I ever was a lover. Please, take all the time you need. Even if you don’t forgive me, I’ll be willing to talk more whenever you’re ready.”

He slowly began to turn around and step toward the estate’s main gate, and you watched him walk with slumped shoulders. At least you knew he truly felt bad about it all—Giyuu was not an actor. He couldn’t lie to save his life—not directly, like how he never said that he loved you. Once you were confident that he was out of earshot, you let out a sob that you hadn’t wanted him to hear, and turned to escape back into your bed for the remainder of the day.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

After a week of your grieving your future with Giyuu, in which luckily you had not been called on any missions, you finally felt okay enough to get ready and go to a group training session. Upon your arrival, you were approached by Sanemi, whose expression was more worried than you’d ever seen it.

“I came to check on you,” he said, eyes flicking between your own as if searching for a response there. You knew he had come to ask about you multiple times, maybe more times than Giyuu even, but Rengoku took his role as your protector seriously and turned Shinazugawa away even when he threatened violence.

“I wasn’t taking visitors.”

“Okay, yeah, I um—I get that. You needed time. Did you at least get my letters?”

You hadn’t realized he had been sending you letters also—you had instructed your crow not to deliver any messages to you unless they were from the master instructing you to go on a mission. Everything else could wait.

“Oh, my crow may have them stored away for me somewhere, but I didn’t want to read any letters last week either. Sorry.”

“Oh no, no, no need to be sorry,” He rushed to reassure you, placing his strong hand on your shoulder in a comforting gesture. You hadn’t realized how much you missed his company; how he effortlessly showed you his sweet side that others didn’t see. Your heart, having felt frozen solid for well over a week at this point, began to thaw out at the genuine warmth you felt from your friend. Overwhelmed with appreciation for him, you drew him into a hug, which he returned after a beat of hesitation.

The training session went without a hitch as you slid right back into your regimen. Sanemi hardly left your side, and other slayers gave the two of you odd looks at the beginning when you had embraced. You couldn’t blame them—Sanemi was feared by many for his quick temper and how he resorted to violence in many situations that weren’t quickly and easily resolved with words. Though you’d never had to be fearful of him, you were able to see why others were.

As you were gathering your things to head back to Rengoku’s estate, Sanemi asked if he could accompany you, which you accepted. You enjoyed his companionship too much to say no.

“Y/n, I want to apologize to you. I know you were upset with me for not telling you about Tomioka when I found out, and I should have. We’re... we’re friends, and I care about your feelings. I didn’t tell you because I was scared to hurt you, even though it wasn’t technically me who was doing the uh, hurtful thing? Look, I’m not good with words, so uh, I—” His cheeks blushed scarlet as you peered up at him in the evening sun. A tiny smile formed on your face before you cut him off.

“It’s okay, Sanemi. I know. And I know you probably wanted to tell me. I’m not angry with you really, you told me eventually. You’re a good friend to me. Thank you.”

You looped your arm through his and continued walking, a comfortable silence between you.

Sanemi was the one to break it. “You deserve better, y/n. I always thought you did, but definitely with all this coming out you deserve better. You deserve someone to love you. I see other couples around, like, kissing and holding hands and stuff and... I don’t know, I just never saw him do any of that for you. The next person should do that and more. You should have someone who isn’t afraid to love you proudly. I know you have a lot of love to give, ‘cause that’s just who you are. You are love. So that’s what you deserve.”

You couldn’t say anything in response—you had never had someone tell you something so heartwrenchingly sweet before. You were coming up to your place, so you stepped on the engawa and turned to face Sanemi before dipping down to place a kiss on his cheek. His blush from before, barely having faded, returned with a vengeance.

“Thank you, Sanemi,” you said, voice barely more than a whisper. You hoped you conveyed how much you appreciated him. You smiled, and backed into your home, watching his lips turn up as he also backed toward the path leading to his home.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Over the following months, you got back into your normal routine and felt much more at peace with your heartbreak. You had the support of the rest of the hashira, even if most of them didn’t know details of what happened between you and Tomioka—it wasn’t something that you were inclined to share. Not only would it cause more animosity to be directed toward him (he wasn’t the most popular slayer to begin with...), but it also caused you a bit of embarrassment that you were toyed with for so long. Regardless, you came to understand Tomioka’s reasoning for stringing you along, especially because of his lack of social life outside of you. You felt bad for him, knowing that now he truly had no one to spend time with; but you definitely weren’t ready to be on friendly terms with him anytime soon so you didn’t make efforts to see or speak with him.

You had grown closer to Sanemi than you were before, which was a feat considering that you were already best friends really, even when you were with Tomioka. You both ate all of your meals together, trained together, often walked each other home, and confided in one another more than ever. Shinazugawa made you very comfortable around him. You were shocked when you realized one afternoon, head thrown back at the sky as you laughed at some clever quip from him, that he had single-handedly returned your smile to you after your heartbreak. You felt a tiny bit of warmth wiggling in your chest.

Walking once again toward the Flame Hashira’s estate, your arms swayed gently by your sides. With Sanemi to your left, you felt very relaxed after a long day of training and goofing off with him and Iguro. You were looking forward to a nice meal and a hot bath. A sigh slipped from your lips at the pure contentment you felt in this moment.

Sanemi’s head turned toward you, seeking your eyes.

“Everything alright?”

“Perfect, ‘Snemi,” your tongue was loose in relaxation and a strange version of his nickname slipped out, alongside a giggle at the slip-up.

His face stretched into a smile, which was rare for anyone besides you to ever see. Walking down the bumpy path leisurely, the backs of your hands kept brushing. The warmth you’d felt in your chest since seeing Sanemi every day turned into a flutter everytime you touched his skin. As his knuckles bumped yours again, you decided to be bold—it was about time you started going for what you wanted, right? You caught his hand in yours and laced your fingers through his calloused ones. Your heart stuttered at the contact, and if you’d asked him how he felt he’d say the same. He squeezed your hand in his and rubbed his thumb in soft circles as you approached your residence.

“Y/n, I was actually wondering if you wanted to hang out tomorrow? With me? Well, duh, but you know...” Sanemi trailed off, his cheeks turning that shade of pink that delighted you so much. He was always so confident in every other situation—in fighting, in conversation with others, in his strengths, and he had been confident in flirting if what you’d seen in past years through your friendship was anything to go off of. His shyness with you was endearing; it told you that he cared what you thought of him. You knew he also had a level of comfort with you that he didn’t possess with anyone else, but you hoped in the near future you could express to him exactly just how much you valued him so that he no longer had reason to be so shy around you anymore.

“Nemi, we hang out every day. Of course, I would love to see you again tomorrow.”

He kept meeting your eyes but then looking away. “Well yeah, yes, we do, but I kind of want to do something different, if that’s okay. Like if you wanted we could walk to the trees where the cherry blossoms are and I’ll bring a bunch of food and we’ll have, like, a picnic or something.” Your heart had to have swelled to twice its normal size.

Still holding his hand, you gave him a reassuring squeeze. “I would love to.”

He finally met your gaze for more than half of a second and his still-pink cheeks broke into a grin wider than you think you’d ever seen on him. You didn’t know if you’d ever seen anything cuter. “Okay, then perfect! And, just to be clear, I wanted this to be a date. Like, romantically.”

You laughed again, throwing your arms around his neck and nuzzling into his broad chest. “Yes, Nemi. I want this to be a date too.”

Pulling back, you looked at his face, and you couldn’t help it. You were smitten with your friend. Well, soon to be more-than-friend, right?

“Can I kiss you?”

His face dropped into a look of pure shock, then elation as he breathed out, “Yes, y/n. I would like nothing more.”

So you leaned in, and he did the same, meeting in the middle. Sanemi may look rough around the edges to everyone else—but to you, he was nothing but soft and sweet. His lips were soft, not just in texture but in pressure, as if he wanted to make sure he wouldn’t be too rough with you. Your lips moved together as if you’d done this before. Thinking about how you knew now Sanemi’s true feelings for you made you smile into the kiss, and you felt his lips turn upwards too. Both of you were hesitant to part, but you had to pull away when it became difficult to breathe. His lips followed yours, not wanting to break.

Sanemi rested his forehead against yours and your peered up into his eyes. You didn’t think you’d ever seen him look so relaxed or blissful. “I should go,” you said after a moment, pulling a sigh from his mouth. “I’ll see you tomorrow, Sanemi. We’ll have more time together then.”

“Alright. If you must go,” he replied, pressing a sweet kiss to your brow before stepping away, off to his own estate. You watched him go. For the first time in several months, you could see yourself being happy again.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

A year later, you still walked everywhere with Sanemi, only now you two never went without your hands clasped tightly together. Your relationship with him had been completely different than the one before that had broken your heart. Sanemi held your hand with pride, he planted kisses on the top of your head and pecked your cheeks even when in the presence of others. When you became overwhelmed with how adorable your partner was and stretched up on your toes for a kiss, he still blushed if you two were in public, but he never turned down an opportunity to kiss his beloved. Not to mention, Sanemi never let a day go by without telling you he loved you. He didn’t really need to tell you in order for you to know—his actions spoke volumes about his true feelings—but each time he told you, you reveled in it and made sure to tell him the same back. And yes, you could say it to him anywhere, anytime without embarrassment or needing to play it off somehow.

His affection was shocking to others. The big, bad Wind Pillar who beat other slayers to a pulp at his trainings blushed when his girlfriend kissed him? He held her hand like his lifeline? His eyes weren’t full of hatred, but adoration? How could this be? Though this behavior was shocking to them when your relationship began, many were able to associate this new temperament to Shinazugawa fairly easily. While still rough in training sessions and prone to losing his temper, since he had been with you others could tell that he made a greater effort to hold his tongue or step away when upset rather than throw senseless punches. You made him want to do better for you, so he was better for you. He was a man of his word.

****

Now, when you walked Sanemi to a Hashira meeting, you placed a gentle kiss to his cheek and looked at the other hashira waiting in the Master’s garden. You waved first at Rengoku, who you’d see later on, then at Tomioka, who still hesitated to return your greetings even though you had released any anger you held toward him months ago. How could you hold anger toward your ex when you were so incredibly happy with Sanemi? Tomioka had taught you what you deserved, and Sanemi had been more than happy to put in work to be that for you. Now you could say with truth that you had no complaints.

#demon slayer #kimetsu no yaiba #anime #fanfic #kny fanfic #kny #kny x reader #sanemi shinazugawa #sanemi x reader

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