Chapter Text
Katsuki watches the fawn hybrid as he always does, at every hour, at every minute, every second.
Sleep? That’s a weakness he's never known.
The sun dips and the deer sleeps and Katsuki is positively ravenous. It's his favorite part of the evening.
He watches the way those green eyes try to take him in as they flutter shut, unsuccessful in following the shadows of his very being. No, Katsuki is much too large, but the little fawn doesn't need to know that. Not yet.
Instead, he allows the little thing to drift off, for what better way to train a body to be pliant and wanting than through the subconscious?
He watches that bare, little chest slowly rise and fall in that way that only deep sleep brings. Soft, unintelligible murmurs that beg for Katsuki to transform into moans.
His many toothed grin is a promise to bring about that very thing. For this little fawn was his to play with since the moment he'd plucked him from the forest floor.
The deer shifts, one leg hiking up as he sleeps on his belly, little tail twitching in time with his nose. Katsuki’s form rumbles and he moves in.
Clawed fingers wrap around a delicate ankle, up to rounded calf, and stops to completely surround a thick thigh. He purrs at the way the knee bends with no resistance to reveal the pretty little sex nestled in between.
Slowly, to watch the drag on freckled skin, he sends out little tendrils to rub and swirl about a budding clit and the lips below. Relishing in the way the soft tease slowly coaxes that sweet moisture to weep. Up and over, around and around, the slide comes easier with each pass.
Red eyes take in the gradual glisten, nostrils flaring at the sweet smell of arousal. The fawn’s hips buck ever so subtly with a moan to match. Katsuki hums.
More tendrils surround the sleeping form curled in his bed of moss and furs, scraping over peaking pink nipples torturously. They curl and curl around them until they can coax that little chest to arch into the touch. Beautiful. Katsuki rewards the unconscious action with little flicks to now hardened nipples.
The fawn cries out but doesn’t wake. Perfect.
That pretty cunt twitches and clenches and Katsuki croons with anticipation. He thumbs one side and pulls, watching with restrained hunger as slick drools its way out. Unable to resist, he flicks his long tongue out, for just a moment, to dip into that dripping hole and drag that slick to polish that tiny clit with it like the jewel it is.
The bleat of arousal above pushes Katsuki to manifest more tendrils, thicker than the ones before. They twist together, forming coils of three, pulsing and searching.
He allows one to drag between the lips of the fawn’s pussy, nearly cooing as each pass makes the tendril shine. Katsuki waits for the day that can be his cock instead, but he doesn’t want to break the little thing. Not yet.
Instead, he rumbles low in his chest as round hips buck and writhe, searching for more. Greedy, red eyes watch the tip of one thick coil poke at the fawn’s entrance, teasing. He presses and slides between folds over and over, gleeful at the quiet, pleading whines it produces.
Finally, once the bedding is soaked and spread thighs are trembling with desperation, he slowly, so slowly pushes inside. Katsuki almost pants at the sight of that pretty hole stretching wider and wider, taking in the girth sensuously. He pushes and pulls out just to watch the tendril glisten bit by bit.
He doesn't stop when the appendage is nestled snugly inside, no. Instead, he lifts the second coil of tendrils and pushes it against the first. Each added inch forces slick to gush like warmed honey, the scent just as intoxicating.
That pretty cunt sucks them both in beautifully, warm and messy. The green fawn’s hips are fucking down now, seeking more from Katsuki. He's happy to provide.
Tummy expanded just the way Katsuki likes, he pulls out the coils with teasing undulations, devouring the image of all that slick being forced out.
Craving the sounds of unchecked pleasure, Katsuki fucks back inside.
The fawn screams and Katsuki grins.
Clawed hands reach out to still freckled hips with the desire to rip out the pleasure by force. He watches. Watches the way tears spring up below closed eye lids, pink mouth wide and panting out fucked out moans.
Watches slick gush every time he pulls out and tiny chest puff out those pretty tits with every thrust in.
Deeper, harder. Again and again. The fawn cums and Katsuki fucks harder. Slick sprays as he pushes his coils against the spongy little spot inside. Over and over.
Wet wet wet and so fucking intoxicating. Katsuki gathers it all up with the third coil, lifting that tiny deer hybrid body into the air.
He spreads thighs wide and hungrily drinks it all in. Two coils in that reddened, abused pussy, and now a third breaching just below. Little tits ensnared just as tightly as that equally delectable clit.
The fawn moans long and loud, the sound echoing around the cave Katsuki calls home. Katsuki fucks him and fucks him, those green eyes only open for the briefest of moments before they roll back into his skull in fucked out unconsciousness.
Yes, he'll be able to take Katsuki soon.
***
There isn’t a second in the day that Izuku’s cunt doesn’t throb with unbearable, insatiable need. He wakes up wet and goes to bed with little change.
He’s left like this. For days sometimes. Every action only serves to drive him just that little bit closer to madness.
He drinks from the fresh pool just outside the cave mouth, and the slide of the water down his throat makes him tremble. He walks, and the brush of his thighs against each other makes his knees weak.
He couldn’t even bear the thought of wearing even a stitch of clothing anymore. The last time he’d tried, the thin material of cotton over his nipples was enough to have him cumming on the spot. He flushes at the memory of the soft chuckles vibrating out of the shadows.
Sunlight warm and lighting the cave with speckled light, Izuku fucks onto his hand with building desperation. Three fingers deep, Izuku fucks and fucks till he’s a dripping mess on the cave floor.
Writhing onto his back, legs are splayed wide in the air with one hand between his legs and the other twining beneath him to use the gathered slick to slide more fingers into his ass. He’s sobbing and pleading, begging at the shadows to help him ease the ache.
It hurts, it hurts, he needs Kacchan to FUCK HIM. Fuck him with something big, something thick, something that’ll fill him up through every hole in his body. He needs it, needs it, he can’t breathe, function, LIVE without it.
Finally, finally, he’s gathered up in dark, pulsing tendrils—his hands ripped away from him with an obscene wetness that splatters to the floor below. His wrists are pulled taunt over his head and thighs are forced wide.
Izuku whimpers his impatience, slick gushing and dripping with every pulse of his hips into empty air. Delirious with lust, he keens long and loud, his cries echoing off the walls and coaxing a growl from his creature.
“Please, please! Kacchan I can’t take it anymore! I want it, I WANT IT-!” His scream is cut off when he feels his antlers pulled, exposing his throat.
He moans at the first touch of something thick and wet against his lips. His jaw drops in welcome, tongue already curling out to coax the tendril down his throat. He groans deep in his chest at the scrape over his taste buds and the stretch of his windpipe.
Indulging in the slow fuck in and out of his mouth, he blearily registers large, clawed hands wrapping around his hips.
He muffles out a squeal when he feels the lips of his cunt spread, holes clenching at the way the heat of something presses in close.
Wet and thick, Katsuki teases the head of one of his cocks against the fawn’s soaking pussy. His own lips curl around his sharp, elongated teeth while he watches more slick pool and dribble down his fat cock.
He allows the little thing to grind its hips down, feral for the way every slow stretch of that hole around his cockhead leaves the lips of that pretty cunt snugly pressed, wet and flushed. He pulls that little body further down and chuckles at the garbled chokes it causes.
He’s inside, inside—Kacchan is inside him! Izuku can feel his eyes cross and drool drip down his chin and bulging throat. His pussy is being spread so wide and making him so full, full, full. More, more please!
He arches with every thick inch that sinks into him, sobbing his pleasure when he feels it settle far into his belly. Slick gushes out of him with every pulse of the cock inside him, veins thick enough he can feel them along his walls.
Katsuki fucks up once into that delicious, tight whole and the little fawn immediately spasms out a fierce orgasm. Katsuki grins and does it again and again, crooning when those pretty green eyes roll back. Red eyes lovingly take in trembling thighs and twitching tail. How beautiful.
The hybrid is a lovely fountain of slick with the way it spurts when katsuki fucks in and the way it overflows down his balls when he pulls out. It coats his second cock just below and Katsuki purrs with the opportunity it presents.
Tiny fawn putty beneath his hands, it's an easy thing to guide a hole over each of his pulsing, leaking cocks. The desperate, fucked out whine studdered from a heaving, little chest is all the prompting he needs.
Pussy and asshole sink onto his cocks and he groans out with a deep shudder. Its tight and wet and fucking perfect. He wants to howl at the way he can feel his cocks rub against each other through the thin wall of flesh.
“Fuuuck, fuck–!” He growls, snapping his jaws. He curses and snarls, his own drool dripping to land on the fawn’s bulged out tummy. He’s losing it. Losing it at the sight of the fawn below him soaked in slick and drool and sweat. He fucks it hard onto his cocks.
Izuku is gone. Gone the moment Kacchan had bottomed out, stretching his cunt and ass further than they’ve ever been before. He’d gurgled out a scream around the tendril still fucking his throat. Then Kacchan was fucking him in the most animalistic sense of the word and Izuku feels his mind slip.
All that mattered now was the cocks inside him, the orgasms ripped from his body over and over again. Thoughts turn into moans, sentences turn into whines, and syllables are rendered nothing but squeals of fucked out delight.
Time and consciousness loses meaning. He passes out with cum gushing from his holes and wakes with more being fucked inside. His meals are the cum Kacchan shoots down his throat and he bathes in the rest, kneading it into his skin.
Katsuki is so pleased. Pleased at the glazed look and blissed expression permanently etched on the hybrid’s freckled face. Pleased at the little sounds of want and adoration out of that tiny, little throat no longer capable of speech. Unless you count the fucked out slurring of what could be his name.
Yes. Everything is perfect now.
He runs his claws over flushed, freckled sink. Licks his barbed tongue over a drooling mouth and rounded tummy.
Yes. Absolutely perfect.