Random KNY one shots

period pains | {SaneMitsu}

Theme: fluff

Note: silly billy tumblr ask lmao // trans!sanemi

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naturally, being a demon slayer usually entailed in having terrible health, in both body and mind. besides being well skilled in fighting, demon slayers had a tendency to lack sleep, or nutrition, or a myriad of other things. which was likely why sanemi's period was so irregular—sometimes occurring for two weeks in a row, other times being absent for months only to hit him in the middle of a mission. he'd never minded the blood too much, and most of his periods were pretty mild, so beside the light discomfort it was alright. but, unfortunately, that couldn't be said about every time he got it. such as now. 

having taken the chance to sleep, able to squeeze a couple hours in because he'd finished his mission quicker than anticipated, sanemi had immediately passed out in his girlfriend's futon, fast asleep. mitsuri had been training or something, possibly buying food, or anything out of sanemi's business, but she's let sanemi stay at her place before leaving. he'd gratefully taken the opportunity, exhausted to the bone. he ended up sleeping only two or so hours, waking up at one point feeling as if someone was stabbing his abdomen.

genuinely believing someone had run a knife into his stomach, he'd jolted up, hand shooting out to his katana which he'd left beside his bed, only to double over on himself. one arm wrapped tightly around himself, the other clutching the handle of his sword, he peered around, gritting his teeth. nobody here, although he did smell blood, and he was still in excruciating pain. it took him a moment to realize that, 1) the blood was not from a wound, and 2), the pain seemed internal.

reluctantly removing his arm, letting go of his katana, he lifted the blankets. he cringed at the red stain that had bloomed on the blanket, the futon, and his clothes. "how fucking long had this been happening?" he hissed to himself, irritated at his lack of awareness. before he could be properly annoyed at the fact that he'd ruined mitsuri's things, a wave of nausea hit him and he had to sit there for a moment, the back of his hand pressing to his mouth. god, fuck, he hadn't had a cramp this bad in ages. if... at all.

somewhat luckily, but also unfortunately, mitsuri decided right then and there to return, the sound of her happy humming making her way to the bedroom. sanemi squeezed his eyes shut, breathing deeply to try and regulate the pain before she came in, but she was already skipping to the room. he was feeling in no ways better when the door slid open, revealing her content figure. the moment she saw the blood, she squeaked, frantic concern creasing her forehead.

"a-are you okay, what happened?" she asked, hurrying over. she seemed to understand the source of the blood immediately after her questions, however, looking mildly less worried. "are you on your...?"

sanemi nodded, swallowing twice before managing to speak. "yeah. fuck, i haven't had it in, like, two months. or something. maybe three. i wasn't paying attention, sorry," he muttered, trying to discreetly shift his weight, his abdomen constricting with the movement.

mitsuri caught on anyway, because he was apparently not subtle at all, and her concern was back in full force. "what's wrong? does it hurt? i thought it didn't usually hurt?" she fretted, brow furrowing as she moved her hands vaguely over his body, trying to figure out what to do.

"i'm fine," sanemi said feebly, which only confirmed mitsuri's worries. she was up and off to get a change of clothes and some tea. sanemi slumped back against the futon, hoping she wouldn't mind too much about the mess. he wasn't a stranger to pain—in fact, it was quite a constant in his life—but this was different than what he was used to, and fuck, it hurt. half of it, he thought, wasn't even necessarily pain. it was this strong ache in his abdomen that made him want to throw up and knock himself unconscious at the same time. although he doubted he could sleep properly like this.

a few moments later, mitsuri was back, putting the tea to the side and scooping him right up into her arms. she was uncaring for the blood, holding him closely and trotting to the bathroom. sanemi was placed carefully into the tub, and mitsuri helped him out of his clothes, putting them aside to wash. whilst he cleaned himself (although it ended up being more like half-heartedly swiping at his legs, watching the warm water swirl pink), mitsuri laid out the new clothes, and a cloth pad (a/n: idk what they used lmao). once sanemi was free of blood, mitsuri helped him into the clothes and brought him to the spare bedroom, bundling him up in the blankets and pillows. she handed him tea, which was warm in his hands, and told him to sit tight.

as sanemi sipped at his tea, curling up on himself and occasionally resting his forehead against his knees, he heard bustling around the house. (mitsuri was likely cleaning things up—once sanemi got rid of this stupid cramp, he'd cook her some food as a thank you, and an apology). at one point, he put the now-empty cup aside, breathing slowly and deliberately. it helped, a bit, with the nausea, but he still felt a headache budding in the back of his head.

mitsuri joined sanemi, after a while, and when he looked up she was sat beside him, clad in more comfortable clothes than her previous uniform. she smiled as he peeked up from his arms, leaning forward and kissing his cheek. "how do you feel?" she asked, petting his head.

"shitty," he huffed, pressing his cheek to his forearm so he could look at her. "how do you deal with this every time?"

she hummed softly, leaning back slightly and wrapping her arms around him. "they're not that bad, sometimes. also, moving around lots helps a bit! and since that's our job, it helps fight the pain," she mused, closing her eyes. "but if they're super bad, shinobu-san gives me something for it. oyakata-sama lets us do paperwork instead of active work, too, on the worst days."

"oh. fuck, i forgot about my missions," sanemi said bitterly, scrunching his nose up. "this better die down soon, or i'm going to hunt down kibutsuji and make him fuck off into the sun because i will not fight in this state."

"ne, lay down, sanemi," mitsuri decided, after a beat. sanemi looked up, arching an eyebrow, but reluctantly complied, toppling over onto the futon, arms still wrapped tightly around his legs.

mitsuri smiled at that, then coaxed him to relax, bringing his legs down. she pressed a hand to his abdomen, rubbing gently, until he was soothed into her touch, eyes fluttering shut. "better?" she asked, taking one of his hands into her free one and kissing between his fingers.

"bit," he agreed softly, and snuggled closer to her. "'m gonna try to sleep. don't stop that."

she laughed, but complied, continuing to rub circles over his stomach. she wondered if, whilst kyojuro had been training her, if he ever thought she'd use it to help get her boyfriend to sleep. either way, it worked, and mitsuri found herself cradling sanemi, whose breathing had steadied out and the pain that creased his forehead had smoothed out. she kissed the top of his head, bringing him closer and wrapping the blankets more snuggly around him. maybe later, if he wasn't better when he woke up, she could send a crow to shinobu for help. she made a mental note to take over his missions, seeing as how it'd be lovely if muzan was tossed into the sun but she wouldn't want sanemi to overexert himself in his state.

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rahhhhh i dont rlly get cramps so sanemi doesn't get to be experienced either (me bc i once physically doubled over on the sidewalk bc i was hit w random cramp I WAS DYING and then gave in and told my dad i was going to go home or lay down in the street bc wtf)