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antipup · 1 year

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sanemi x fem!reader..

summary ; 4k+ smut, brief fluff, slither of angst, au, sanemi is kinda a gamer, reader is a sweet gf.. idk what this really is, just filth but enjoy ♡

warnings ; 18+ only, minors dni. use protection, always practice safe sex and safe kink play! mentions of starting a family, breeding, creampie, roughness, size kink?, spitting, harsh words, degrading, praise, humiliation, dirty talk. note, paragraphs in italics are flashbacks

home, everything here felt so snug and peaceful, the low hum of the television on in the background whilst you placed some new trinkets upon the bookshelf to the side of the room, a new photo frame, and a couple fresh succulents you had repot into their cute new planters you painted just yesterday, now spending the late hours of the sunday lounging around.

it was coming up on the third year that you, and your long-term boyfriend, sanemi, had moved into an apartment in the city together.

even at the time, it was an easy choice and one that felt so natural. of course, you both had things you were leaving behind back in your town, for yourself it was your previous job and loved ones, for sanemi it was genya- even though the younger brother of the two insisted he would be fine, having just started college and found a roommate named tanjiro, who seemed more than pleasant.

sanemi was always the sweetest and gentlest soul when it came to family, sure, he had subtle ways of showing it since he was rather reserved when displaying emotions but that doesn't mean he is incapable- you saw and felt his affection every single day, tenfold.

this cough was not letting up, you swore you could feel your ribs rattling with every rasp, the worst was that it had even woken you up an hour before work- when you needed all the hours of rest you could get, but of course, your body had other plans.

you curled up, clenching your stomach as you sputtered out, an uncomfortable itchy sensation in your throat every time your coughing settled down.

faint grumbling sounds beside you made you hold your breath in hopes to quieten yourself, you winced, knowing you had woken up your boyfriend, “m’sorry.” you croaked out.

your heart dropped when you heard the bed creak, the mattress lifting a little as sanemi sighed and pushed himself out of bed, the faint sounds of his footsteps dispersing as he left the room.

anxiety bubbled in your stomach, the day had barely even started and you wanted the sheets to swallow you whole and have a redo of the morning.

sanemi wasn’t much of a morning person so he was easy to irritate but you felt especially guilty when you recalled that he had an online webcam interview in a couple hours- you had helped him pick a new suit out and everything. even helped soothe any doubts and hesitation he had.

you spent the next ten or so minutes with your head ducked under the cover until you found enough strength, physically and mentally to step out of bed, maybe get a shower to wake up since you knew you couldn’t manage falling back asleep.

“what are you doing?” your head whipped around to the sound of sanemi’s gruff morning voice as he stood by the doorway in a pair of loose grey sweats, “need a shower.” you mustered up an audible mumble from your throat, which was very much burning, rubbing your arm to comfort yourself.

you couldn’t really make out the expression on your boyfriend's face, what with the curtains still pulled shut and no lights on, whatever sickness had its grip on you was also making you lightheaded, which didn’t help.

“don’t be stupid.” he scoffed, “you woke me up with how much you were coughing.” he shook his head, walking around to your side of the bed and pushing you down by your shoulders, “how did you even get sick?”

you frowned, the sound of irritation in his tone made your eyes sting with tears, “don’t know..” your voice came out weak and you looked down at your lap, “i’m sorry, i know it’s not a good day, i don’t wanna stress you—“ sanemi cut you off, stepping back, “stop that.” he grumbled, arms crossing over his bare chest. you looked up and noticed the medicine in his hand, and a bottle of water on the nightstand too.

“i’m not mad because you got sick- well i am, you should be looking after yourself,” he tutted before continuing, “we just have to get you better, it’s not gonna help if you’re not resting.”

your bottom lip quivered a little, “oh..” you sighed in relief before shaking your head, “but work—“ sanemi cut you off, his fingers squishing at your cheeks to push your mouth open, placing the medicine on your tongue before he cracked open the cap on the water, making an encouraging ‘ahh’ sound and letting you swallow the medicine down easily, “no work,” he set the bottle back down.

“i already left your boss a message, it’s not like you’ve taken a sick day much at all this year anyway so i’d like to see him try and get on your ass for it.” he shrugged, gesturing for you to lay back down, already tugging the sheets over your body.

“i wanted to make us breakfast before we both had to leave,” you jutted your bottom lip out in a pout, “your favorites for good luck for the interview.”

“i can make us breakfast.” he shrugged and you shook your head adamantly, “no, you should be getting ready for the interview.” you told him.

sanemi huffed, feeling stumped until he spoke up again, “okay.. well, how about i order us some breakfast, and in the meantime, you help me make sure i don’t fuck it all up?” he suggested, chewing on the inside of his cheek nervously. you already nodded by the time he mentioned ordering breakfast for the both of you and comforting him was a given.

you sat up, patting the space before you sat up, sanemi crawling back into bed beside you, snuggling his arms around your waist and your hands found their way into his icy-toned hair, “you’re gonna do so good! you’ll kill it, remember what we practiced?”

the two of you spent the morning sharing your delivered breakfast and comforting each other, soothing a nervous sanemi whilst he rubbed your back every time you coughed, pushing your head against his neck and laying sweet fluttering kisses on your flushed skin until he needed to get himself dressed and situated in front of his computer for the interview, promising that it wouldn’t take too long and he’d run you a bath once it was wrapped up.

you couldn’t find sleep again that morning, cough keeping you awake and you were eager to know how sanemi found his interview. “they offered me the job on the spot!” sanemi burst into the room, sliding on his socks and nearly losing his balance- if you could’ve screamed you would’ve, excitedly bouncing in your spot on the bed as your arms flew open in joy, sanemi rushing over to engulf you in a hug, “i told you they’d love you baby.” you cooed.

sanemi only leaned back from the hug so he could cup your face, pressing firm kisses around all of your features until he caught you in a gentle kiss, seconds going slow as the two of you enjoyed each other's closeness, your cheeks feeling so warm you couldn’t tell if it was because you were sick or how his lips pressed plush against your own, tasting the vanilla chapstick that you spread on his lips this morning, “i love you but you’re gonna get sick if you do that.” you pulled away ever so slightly, scrunching your nose in delight.

“nah, i’m tough.” he told you confidently, puffing out his chest as if to help prove his point, making you burst out laughing, "mhm, my big tough sweetheart." you cooed teasingly as your hands reached out to pinch his cheek, his own hands flying up to swat you away like a pesky fly, seeing the warmth rising in his cheeks, "now, how about that bath?" you tilted your head.

you yelped in surprise when you felt his arms swooping under your legs, the room spinning a little as he stood up on his feet, firm grasp on you, "did you get sick just so i'd have to run around after you all day? so you'd get my attention?" he scowled playfully, "you're such a pain."

sanemi was the one.

you couldn’t help your mind often drifting off into the thought of your own little family, only to shake your head rid of the daydream and feel guilty afterward. It wasn't like it was unreasonable to want children, and you knew sanemi wasn't ever opposed to the idea, but the thought of even discussing it with him was daunting, butterflies whirling around your tummy in anxiety- you hadn't even married yet, you had to remind yourself, so you settled on sweet little daydreams and wishes for the future, knowing one day it would be reality.

the thought of little kids running around your homely apartment, attached to sanemi's hip, or cuddled up under his arm in bed made your insides flutter, tiny fireworks sputtering under your skin and setting it alight as you envisioned it all.

you glanced towards the bedroom, hearing cursing and keyboard clicks as you approached, the door creaking open with a simple push. you could always come in and out of the room, as you pleased, sanemi was always fully immersed on the pixels in front of him when he was playing, and often you found yourself wandering in, checking on him when he spent hours on the weekend in front of his double monitors, nonsensical call outs to his online teammates in whichever game had his attention nowadays.

you didn't mind, you both lived together and found plenty of time to spend in each other's company, even if it was in silence it was always the comfortable kind, barely ever had either of you felt something was lacking and if you ever did you knew you could try and work things out. you always valued communication, sure, sometimes it was a guessing game with sanemi but he would never go so low as to become petty with arguing or ignoring you.

you felt his shoulders jump a little when your fingers found place at his nape, dragging up to tangle the digits into his pale strands of hair, repeating the comforting motion as he relaxed his tense muscles, you even noticed his tone becoming collected rather than roused as he usually was when his fingers clattered against various keys and voice boomed down the microphone that hung above his monitors.

"you okay?" he spoke up, eyes still locked on the screen in front of him, "mhm." you hummed, leaning in to press a kiss to the top of his head, careful you didn't bump his headset off.

your arms wrapped loosely around his bare shoulders, your cheek squished against the side of his chair as you rested there, aimlessly watching sanemi move around his character, flashing and bullets flying everywhere across the map until 'DEFEAT' flashed across the screen, your boyfriend clattering the mouse across the desk and letting out a string of curses, "i told you to stay mid! why the fuck are you solo flanking?!" he exclaimed, hearing muttering through his headset in response.

you giggled, squeezing your hands at his shoulders and watching his head tilt to meet your gaze, a soured expression still on his face, "what's so funny?" anyone else might've found it intimidating but you found it amusing.

"you're just cute when you get so into the game." you snickered, his expression unchanged as he leaned back against the chair, and you felt his hand tug your arms until you leaned your front over one of the armrests of the chair and his fingers tilted your chin up, "you distracted me," he deadpanned, "you're lingering."

you feigned confusion, a brief shake of your head, "nemi, you haven't left the room all day, just missed you." you spoke sweetly and didn't miss the slight smile that was tugging at the corners of his lips.

"oh.." his eyes had a slight new gleam to them and you groaned, "why'd you take it like that?!" you complained light-heartedly, lips pursing together in bashfulness.

"what are you talking about?" he threw his head back, chuckling. you didn't miss the way his hand which was previously wrapped around your arm, now rested at your lower back, with his eyes back on you he spoke again, "you look cute." his eyes dragged down your body, admiring the skimpy little pajama set you had gotten just to laze around the house- maybe catch your boyfriend's eye, success.

"i know." you cooed, going to push yourself up since the armrest digging into your lower ribs was getting rather uncomfortable, but of course, your boyfriend who was rather fond of manhandling you around, had other plans, "c'mere." he tugged you until you were rested across his lap, lifting your legs over the armrest as you leaned against his side.

feeling trapped by his heavy arms, had your stomach bubbling with elation, eyes glancing down, fingers reaching out to swipe across the scarred skin, pinching gently when you reached his bicep, there was nothing you loved more than feeling the weight and plush muscle of his arm against your palms, you could've worshiped and admired him all day long.

you jolted in surprise, an unfamiliar voice pulling you out of your daze, "man, can you stop flirting with your girl and queue us into a lob—" you heard sanemi click a button to mute the voice coming from the headset, your eyes wide before you laughed behind your hand, "it's fine, i muted my mic too." he rolled his eyes, seeming a little embarrassed that he had been so distracted he had gotten caught even by his friend.

you blinked up at him, still, a little amused as another laugh bubbled in your throat, though it soon fizzled away when you felt his warm fingertips dragging across the thin layer of your pajama shirt, nipples reacting almost instantly as they poked at the fabric.

with your breathing held you next felt his hand pushing up your shirt, seeing the nod of his head, "up." he gestured with the command and your arms moved before your brain could even process, letting him pull your shirt over your head, not wasting a second as he leaned in, and you could've sworn you saw the hunger in his eyes, making you feel like some sort of prey which had you tummy doing flips, breathing staggered.

"shit.." you stuttered out barely when you felt his thumb circle one of your nipples as his mouth ghosted closer and closer to your other, warm, wet kisses trailing along your sensitive skin, gasping when you felt his tongue flicking across your nipple, your fingers flying to his hair.

you could feel his thumb circling your nipple and his other fingers dug into your sides, with his hands and mouth all over you like this, it made you feel so lightheaded, "s-sanemi, mm," you hummed, "here too." you pushed his other hand- which was squeezing at your thigh, upwards to cup your clothed warmth.

he obliged, not ripping his head away from the attention he had on your upper half as he pushed aside the thin fabric of your pajama shorts, "s'fucking soaked." he grumbled, feeling the vibration of his tone in your chest as his finger rubbed up and down your pussy, fingers slicked in no time.

you would've felt ashamed when you heard how excited you had gotten already, hearing the squelch of his finger push inside you, but you were far too blissed already to give much care.

"relax, i got you baby." he cooed, ever so sweetly, kissing upwards from your breasts to push his lips to yours, hearing a slight chuckle on his lips at how dazed you were already, sloppily kissing him back as your hips stuttered.

sanemi was dragging his finger in and out which was already making your skin prickle with joy, soon feeling him push a second inside which had your breathy moans turning into desperate whimpers, practically rutting against his two fingers.

"nemi, that's good, s-suh'good." you mewled, his other hand that was holding open your thighs dragging up to your lips, pushing his thumb passed and pressing on to your tongue.

"poor baby, you can't help it can you?" he scoffed, almost mockingly as he titled his head to watch his fingers disappear inside you, thumb beginning to tap and circle on your clit, almost immediately having to move his fingers from your mouth so he could hold you back down again, you watched in awe when you saw him lean in and spit in between your legs, salvia mixing with your juices.

"close, please.. oh god." you whined, thighs quivering as he relentlessly held you down, his fingers curling up inside you and thumb doing wonders on your clit. your head knocked back and you squealed as a sudden wash of electricity flew throughout your body, pure bliss taking over each and every one of your senses.

"fuck, that's so hot.." you heard him groan as he watched you orgasm, fingers sticky with your sweet release, his hips even bucked a little against your ass, and you could feel how rock hard he was.

you were a little disoriented as you came down from your high, giggling at the pleasant buzz running all throughout your body, only coming to once you heard your boyfriend's gruff voice once again, "get up." you felt the harsh squeeze at the flesh of your thigh and with a push you got yourself up from his lap, turning to face him as you perched yourself at the edge of his desk.

sanemi lifted his hips from the chair slightly, enough to tug down his sweats, kicking them off somewhere across the room, cock flush against his stomach, tall and the tip an angry red, a prominent vein running up along the underside of him- it had you drooling on the spot.

you blinked a couple times before realizing he was motioning for you to spin around, finger twirling in a gesture. you twirled until your back was to sanemi, hearing the creak of his chair when he stood up, jolting in surprise when you felt his hand swat against your ass, a burning sensation fizzling at your skin before it cooled off. his hand pressed against your back until you leaned against the desk- thankful his monitors were further back.

"stay still." he hummed, forehead furrowed slightly as he watched the way you pushed back against him, "you're like a bitch in heat, so fucking incessant." he landed another whack to your ass which had you reeling, only pushing back further into him.

he pinched and poked at the red marks across your ass, enjoying the cute little sounds you made here and there when his fingers dug a little too harshly into the skin or pinched until your arms flailed, "stop teasing, want your cock so bad." you almost cried out, leaning yourself up on your palms a little to ground yourself.

sanemi couldn't find it in him to say no, you looked so desperate already, he almost felt bad. "stay still, i won't tell you.." he cut himself off, bringing his arm around your throat and pulling your back flush against his chest, wedging you between his body and the desk, "again." he squeezed your throat in between his forearm and bicep, in a chokehold.

your voice was weak from the pressure of his arm against your neck, feeling him push the tip of his cock inside you, squeezing around him nonstop already, you just couldn't help it, the way he was pressed so closely to you had your pussy clenching in delight, "sh-shit, i'm sorry, i'm sorry.." you gasped out, feeling his arm around your neck loosen up, his chest still pressing against your back and you could feel his hot breath against your ear.

"haven't even fucked you dumb yet and you forgot how to breathe properly." he scoffed, a harsh sudden thrust almost knocking you forward if it wasn't for his firm hold on you, "oh my god, oh my god!" you chanted, eyes squeezing shut as you felt him bottom out with the ruthless push.

"pussy sucking me in so good, fuck.." he sighed, dropping his arm to place both hands on your hips, one of your hands settling at the desk whilst the other reached round to claw at sanemi until he took a hold of your arm.

"that's it, take it." he let out a euphoric chuckle as he reeled his hips back before pushing back into you, starting a quick but deep pace, eyes glued on the way he buried his cock deep inside you with every push and pull.

you got louder and louder, more nonsensical as each second passed, "oh nemi!" you squeaked, "feels s'good baby, mm, more, more." your nails dug into the soft foamy mousepad which expanded across the wooden desk, scratches and claw marks indenting the fabric as he somehow reached an even better angle when he hiked a leg up on his chair, feeling the tip of him hit that delicious gummy spot inside you that had puddles of drool spilling from the corners of your mouth.

"you're fucking disgusting, look at you." he groaned, skin glistening in a sheen of sweat as the sounds of your mewls rung like heavenly bells in his ears, coaxing him to keep rutting his hips animalistically against you, the dizzying sound of skin slapping against skin bouncing from wall to wall.

"aren't you embarrassed?" he leaned in, murmuring against your ear which only made him feel even deeper in your guts, "n-nu uh, love your dick too much.." you cried out, head lolling back against his shoulder, hand squeezing around his arm as you pressed back against him.

"right there? hmm?" he cooed, thrusts getting shallow and sloppy and he could already tell by how your words slurred and moans got higher pitched and broken, you were close, "i got you baby." he grunted, keeping your hips up and stable, knowing you were too far gone to keep yourself up.

"gonna fill this pussy up full of cum, so fucking nice, breed you like the good little fuck toy you are." he hissed, feeling the way you spasmed around his cock with every single word, broken moans spilling out of your mouth as your back arched and your high washed over you, "that's it, oh shit, just like that baby.." he pushed you further against him, hips quickly slapping against you as he chased his own high.

"p-please, inside, need your cum so bad." you begged, so prettily it had his eyes rolling to the back of his head, tight grip on your ass that was sure to further bruise the broken skin.

he spilled ropes and ropes of cum deep inside you, your whole body trembling as his warm cum coated your insides, cock still stuffed in your swollen pussy, "don't move!" you whined when you felt him pulling out, hand gripping onto his arm to keep him in place, "wanna feel like this a lil' longer, don't wanna waste it." you breathlessly whined.

sanemi poked his tongue on the inside of his cheek, leaning his head back, and looking at where the two of you connected, his thick pearly cum and yours melding together and prettily painting the inside of your thighs and the expanse of his cock.

sanemi leaned over your back, not putting too much weight on you as he pressed wet kisses along your shoulder, seconds feeling like minutes as you basked in the warmth beneath your boyfriend's body, feeling so full and content.

you groaned in discontent when he pulled back, fingers dragging along your sore, bruised skin where he had slapped, pinched, or grabbed, admiring the pretty fresh marks decorating your body, "c'mon, let's run a bath before you start cramping up." he chuckled, and to your dismay, pulled out, wincing at the way the liquids dripped down the inside of your thigh, feeling empty.

"baby.." he tilted his head, watching you in the same position, eyes widening when he saw your shoulders shaking a little.

"m'okay." you warned before he even asked, standing on shaky legs and turning to face him, arms reaching out and squeezing tightly around his chest, "i just love you so much," you soothed down your small sobs as your intense high fizzled out faster than you liked, head nuzzling against his chest, "just wanna stay close for a little more." you spoke gently and sanemi felt his heart pang.

"i'm here, i'm right here." he bought his hand up, patting the top of your head as he rocked back and forth with you slowly, the two of you spending a little more time just close, intimate. sanemi only moved once again to lift your chin, his hands cupping your cheeks and trying to inspect if you were hurt, "you're worrying me." he sighed, clearly concerned which only swelled your heart further.

"i promise, i'm okay. just felt so warm, and nice." you reassured your boyfriend, leaning up until your lips were plush with his, thumb soothing over his cheek

sanemi grabbed your hand, kissing the back of it as he nodded understandingly, "you'd tell me if i hurt you- i mean, did something you didn't like right?" you nodded at that, knowing it was important, "good." he sighed in relief, a smile spreading across his lips before he caught you in another kiss, "and.. i love you too, a lot." he muttered against your lips, almost inaudible. you decided against teasing him, already noticing the warmth rushing to his cheeks, it was enough to make your heart skip several beats.

"now, how about that bath?" you hummed.

fairy note..

tuh dahhh, my first kny one shot. i've written for different fandoms before but i don't know why sanemi possessed me to make my first anime writing about him probably the lack of sanemi smut but, damn this scratched an itch in my brain, hope this was bearable to get through for you

requests and feedback is open.. ♡

#♡. ꜝꜞ fairy's writing #kny #kimetsu no yaiba #demon slayer #kny sanemi #demon slayer sanemi #sanemi smut #sanemi x y/n #sanemi x reader #demon slayer smut #kny smut #kimetsu smut #sanemi angst #sanemi fluff #sanemi one shot #sanemi shinazugawa #sanemi

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