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kunigmis · 11 months

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pluck my cherry?

isagi yoichi x female!reader

synopsis: isagi yoichi asks his dear older stepsister a favor, which is to pluck my cherry? you’ve been a part of his life since he was 10, so you’re disgusted by the thoughts you’ve had of him. but, he’s just so sweet and innocent, you think maybe corrupting him wouldn’t be too bad…

content warnings: minors do not interact! all characters are 20+, age gap (7-years), stepcest, virginity loss (on isagi’s end), unprotected sex, oral (female!receiving), handjob, creampie, squirting, hinted breeding kink if you squint, kind of sister-con!isagi (he’s in love with you), heavy petting and groping, cum eating, pervert!isagi…

notes: i’d love to do virgin!isagi i’m sorry, but like that’s getting me all hot and bothered ૮꒰ ˶> ༝ <˶꒱ა virgin!isagi who’s a natural at sex!! love heart eyes… the two of you have grown up together and you’re adoration turned into lust… parents aren’t really mentioned but your mother fell for isagi’s father (just imagine his parents had split up). isagi has been in love with you since he was 10 btw. probably ooc… ૮ › ༝ ‹ ྀིა and!! this is for lovely @killsaki‘s family ties collab!! i loved being part of this, it was sm fun <33

WHEN ISAGI COMES TO you, all blushing and staring lovingly at you with his pretty and big blue eyes, asking you a favor you, dare say, wanted to say no to, you’re only allowed to hesitate for a moment before he’s hounding you for an answer. he’s bigger than when he was as a teenager, always having stood taller than you, so it’s easy for him to press you into a corner and keep you there for as long as he wanted.

you’re not sure whether or not he’s serious. he’s always been a bit of a jokester, he’d come in and play with you like a toy. despite being older than he, it was as if the “age barrier” played no part in your guys’ relationship. you wanted the respect you knew he could give, yet he couldn’t bring himself to show it. and, he didn’t really mind that you were older anyway.

but, you always found that to be endearing. you kind of liked to be treated like you were as young as he was, to not have your age be a factor in how he treated you. he was usually upfront about how he felt, never acting like he was forced to interact with you and like he actually wanted to be around you. it was sweet and had you feeling things you shouldn’t for the person he was to you. but, you’d push those thoughts aside when you’d shove your hand into your panties and treat yourself to a playful game called crushing on your little stepbrother. and, this was not a game a 30-year-old woman like you should be playing.

so, you shake your worries once more and ask him if he’s actually asking or just messing with your feelings. because you’re sure that, either way, you’d say yes despite your inner turmoil.

“why would i joke about this, big sis?” isagi knew your sick and gut-twisting feelings whenever he’d use that to address you. his eyes were sharp and perspective, so he would easily catch you pressing your thighs together and anxiously avoiding his gaze. you were so easy to read, and he’d hope just as easy to get into bed. “c’mon, please? f’me.”

god, he was doing to be the death of you. isagi had you tangoing with the devil with the wild thoughts he gave you. you’ve imagined it so many times, and you’re sure you’ll imagine it so many more, but now’s the time when your thoughts become reality. all those sick and twisted ideas of fucking your little stepbrother on every and any surface in your house that you could were about to become a little more than just scenarios in your pretty little head.

isagi doesn’t even question your silence, he knows you’re thinking about it—and he knows you’re going to give in. fuck, he licks the back of his teeth in anticipation, trying to quench the urge to just pounce on you now. he’s wanted this for so long, remembering how his eyes would always get so big and starry when he’d look up at you as your family had dinner. you treated him so kindly, so sweetly, like he wasn’t some random 7-year younger child your mother brought in with an extra bonus of a father figure. you accepted their presence quickly and doted on isagi with innocent adoration. that is, until you both knew it turned into something a little south of innocent and a little dirtier than adoration.

and, so, you’re left to swallow down any refusals and instead nod meekly, so easy to give in and you’re sure isagi would be using such a thing to his advantage later on.

finally, you were within his grasp and he wasn’t planning on letting go.

“fuck—! ‘ichi, please!”

an hour had passed since isagi and you got to it. you’re a creamy and hot mess now, hair tousled and stuck to your sweaty forehead. your lips are red from continuous biting, by both you and isagi, and are begging to be plucked like the pretty cherries they were, “s-stop teasing already…”

you watch as your little stepbrother tongues his way into your pussy, all hot and squirming with the walls of your insides. he’s moaning against you, sloppily eating you out and taking every moment, every second he can to engrave the taste and smell and feel of you into his mind. he’s coming off too needy for his own liking, but how could he not be when you’re just so ripe for the picking?

isagi only relents for a second to give you a laugh, kissing your swollen clit before he’s puckering his lips and sucking with fervor. you throw your head back into your pillow, tongue heavy in your mouth that all you can do is cry and palm at isagi’s skewed hair. you got it so messy, fingers tangling within each strand, that you’re not sure who looks worse.

“s’good, ‘ichi, fuck,” you’re twitching from overstimulation, being denied orgasm after orgasm as isagi would makeout with your cunt just before pulling away when you were on the brink of release. for being a so-called virgin, he was great at giving head. “w-wan’ cum for you… need it!”

you’re begging and squirming beneath him and his hot mouth. his arms circle your thighs and hold you down, thick fingers have their nails pressed into your skin that they create small crescents in their wake. he’s nosing at your clit now, mouth back at your entrance so he can dig his tongue into your messy cunt. he curls it just right, wiggles it enough to reach further than before, and you’re seeing white by the time you can moan out a warning.

“fuck! fuck!” you’re arching off the bed and thrashing, so overstimulated that you’re no longer in control of how your body moves. meanwhile, isagi keeps going, drinking in all of you to not waste a savory drop. his eyes are so droopy, practically swirling in a pool of blue and rich lust that you’re sure you’d drown if you got too lost in them. and, it was just now that you’d noticed the soft humping of the bed isagi was doing.

you pant a laugh, move a hand to brush the hair from his face and give him a small tug, “‘ichi, so cute… humping t-the bed,” you’re in no state to be teasing, but the blush on isagi’s face and the way he hungrily comes up to hump your wet pussy, you’re just babbling whatever comes to mind now. “why not put those hips to use and fuck me already?”

isagi’s eyes go wide, letting out a moan when your hand comes to toy with his dick through his boxers. he’s so thick, you can feel the heat and weight within the palm of your hand. you’re sure you’re drooling right now, but you can’t help the way your hand eagerly dips within his boxers to start jerking him off.

you start slow, only circling the tip before you fist his cock from base to tip. isagi shutters when you do, muscles flexing as he holds himself above you. you watch in awe, eyes honed in on the facial expressions isagi makes as you play with him. his brows pinch upwards, eyes screwed shut as his mouth falls open in an oh. he’s so vocal, nothing like past encounters you’ve had, and you’re embarrassed to say the noises he makes may just make you cum untouched.

“f-fuck, big sis, j-just like that,” isagi begins to thrust into your hand and tries to match your pace, but your hand is moving too fast and he’s just feeling too good, that his hips stutter and he’s quick to try and pry your hand away, “wait! ‘m-m cumming—!”

you don’t stop your ministrations, continuing to ride out his orgasm as white peaks from above his boxers and begins to seep through their material. isagi’s head hangs on to your chest, a long and low groan having left his lips at his release. god, he’s so hot, and the way he keeps moving his hips is so cute.

isagi pants hotly against your skin, slowly coming to a stop as you remove your hand and press them to his lips. “open up,” he eagerly does as told, tongue swiveling out to wrap around your fingers and lick his own cum from them. he’s staring at you while doing so, fair face flushed red down to his chest as he moans around your fingers. “what a good boy, ‘ichi.”

if he had one, isagi’s tail would be wagging with the praise. he’s practically a dog in heat, tongue lapping any body part of you as he humped the air. it’s like he’s imagining the feel of your pussy around his dick without having even put it in.

by the time isagi’s done with your fingers, you had already used your other hand to reach down and tug his boxers off. he obediently shimmied out of them, his dick big and thick as it rubbed between the folds of your cunt. “c-condom—“

isagi had the mind to reach for his pants, but your hand snagged his between grimy fingers and pulled him back, making him gasp when your other had begun to line him up with your entrance and ease him in. “fuck—wait—big sis!”

you shiver when he’s fully within you, the stretch new and giving a whole other meaning to sex for you. you wouldn’t be able to go back to anyone else’s dick after having isagi’s. it was molding your walls to fit only him, making sure that your pussy knew the shape and every little detail to it that there was. you’re sure that it was made just for you—that isagi was made just for you.

“f-fuck, big sis—s’hot, s’good. i want t’ cum already—“ isagi didn’t even give you time to breathe with how quickly he began thrusting. the second you slid him in, raw and all, he was seeing stars and thrusting away. his hips were glued to the globes on your ass, hands pressing to the underside of your knees to have you bending in a way that he saw himself going in and out within just a few inches away. he was so enamored by the sight, by your pussy, that he began to feel dizzy. “you f-fuck me so good.”

you’ve never felt so good before. isagi was bringing you to levels you’d never reached, and you were almost positive he wasn’t a virgin; but, with how sloppy he was in his movements, be it giving head or fucking your cunt, you were led to believe otherwise.

“yes—‘ichi r-right there!” your eyes cross when his tip hits that spot inside you, kisses it repeatedly, and abuses it with a mission. he’s so sloppy and yet that just makes it so much better, having isagi pounding into you without a thought within his pretty little head, just so focused on how you feel and getting you two to release, has you forgetting all about where your relationship now stands. “so hot, ‘ichi!”

isagi is nodding with your words, hips never stuttering despite how he loses his rhythm every other thrust. who knew pussy would feel so good. he’s practically head above the clouds right now, your walls are just so gummy and wet that he’s slipping out and back in so easily. he’s still got the taste of you on his tongue, letting it hang out to drop a glob of spit where the two of you meet. he’s never going to get enough of this; he’ll fuck you every day, anywhere and everywhere he could think of; he’s never going to let you go.

when you clench around him, he jolts forward, sending you into a further bend than before. you’re screaming, his name a mantra you can’t help sing. ‘ichi, ‘ichi, ‘ichi, he swore he’s never heard anything more angelic than that before. with your lips all red and looking so good, isagi forces himself to remove his hands from your knees and press his shoulders into them, having his hands linking with yours as he messily kisses you.

it’s all tongue and teeth and spit, just so messy that you have it dripping down your chin. you moan into his mouth, swallow the noises he returns, and suck his tongue like some candy. isagi watches in a daze, eyes lidded and glued to the way you suck his face. you’re liking this more than he originally thought, but he’s not one to complain when your nails dig into his hands and plead for more.

“s’good, s’good! gon’ cum! i-inside? please?” isagi gasps into your mouth, letting your tongues press and slide together as his hips stutter all over the place. your pussy spasms and sucks him right back in, like it has a voice of its own and it’s begging to be bred. isagi whines at the feeling and only pleads more.

you’re not all there right now, brain all mushy and gooey, so you just nod and babble incoherently. isagi isn’t even listening, only focused on the release coming quicker and quicker. it builds, the metaphorical dam blocking it breaks and he’s panting and gasping into your mouth as his cum is fucked into your cunt.

“w-wait—‘ichi, i-i feel like i’m going to pee—!” you’re crying, having been fucked into a bawling mess as your lower stomach burns and tingles like before you use the restroom. you’re hiccuping with every thrust isagi gives, legs shaking over his shoulders and you’re going cross-eyed when you feel yourself lose it all.

isagi is so lost in getting milked dry by your pussy, and it’s only worsened when you cling to him and cum around his dick and along his abdomen in spurts. you squirted. “oh, f-fuck that was fucking hot,” the black of isagi’s hair sticks to your sweaty chest, his tongue licking along your chest and kissing marks into your skin. he’s trying to calm down, but your juices just keep flowing and making a mess that he can’t go soft. “b-big sis, fuck, stop please… my dick’s going to fall off…”

you’re trying to stop spasming, trying to let yourself down, but you just can’t. it wasn’t enough, you’re so hungry for isagi’s dick that your pussy doesn’t want to let him go. you’re tightening around him, practically stuck together by your release that you’d probably tear if pulled apart.

“o-one more time…”

there’s no going back to how things once were now.