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Deku’s not all the way gone but he isn’t really himself, either. Katsuki only knows these two things because Deku hasn’t said a word since he was hit by the Quirk. Settles for tilting his cute little head and blinking owlishly at Katsuki instead of running that pretty mouth of his like Katsuki’s used to. But when he does open his mouth, he’s sweet. Voice drips all over Katsuki like honey and smooth burnt sugar. And still lets “Kacchan” roll off his tongue as easily as he’s always let it.
It’s Deku. Just not the Deku Katsuki’s used to. And that’s fine, whatever - he likes all Dekus. He’ll take all the Dekus in the fucking world if they’re being offered to him. So he doesn’t mind keeping one with long with bunny ears beneath his curls and a cute fluffy tail to match for a while. Katsuki hardly realizes anything’s different ‘til the idiots tell him there’s been some freak accident.
The bunny thing suits Deku a little too well and Katsuki has a sneaking suspicion he’ll have to make a quick run to buy a few accessories before the next time they fuck when this is all over.
Anyways, point is: Dekus himself, but not all the way. And Katsuki’s just a little torn ‘cause of this. Everything was fucking fine. 9 hours until the hybrid Quirk wears off, whatever. They’ve been through Quirk shit before and this one ain’t anything deadly - Katsuki was expecting Deku to be sleep for the majority of time he was affected. And he was. Like he said, everything was fucking fine.
But then Deku wakes. It’s noticeable ‘cause it’s quiet in Katsuki’s room; just him studying at his desk and Deku silent in his bed, under his sheets.
And then it isn’t quiet.
Deku starts shifting, pushing the covers off his body and squirming around. Not too unusual; Deku gets warm as fuck when he sleeps, but he’s a little more fussy here. All bothered, twitchy.
Then his ears are twitching. Y’know, the long white ones that resemble a bunny and look way too fuckin’ normal on him? Yeah, those. Twitching fast in cycles with his movements. He’s rolling onto his front and starts humming. Something soft, melodic and at the back of his throat. Something a little pleasant if Katsuki wasn’t so fucking confused.
Cause why the fuck is he humming. What the fuck even is that?
Katsuki’s pencil’s down now and his eyes are focused on Deku. They trace over him, ears to his tail. Down to his bare freckled legs and then his stupid cute toes. Blinks again when Deku’s face is moving, rolling into the sheets on Katsuki’s bed. His nose twitches and he fixes his position so his face is pressed against Katsuki’s pillow instead. And then Deku’s rubbing all on that.
Humming, rubbing, ears twitching, then his fucking tail starts going. The small thing of white fluff somehow flicking, fast, a little violently and suddenly Deku’s whining.
Katsuki’s homework is completely forgotten now; Deku’s got his full attention - not like most of it wasn’t on Deku to begin with anyway.
“Baby,” Katsuki tries, lowly. Sees if that’ll get a reaction out of Deku, ‘cause his eyes are still closed. “You sleep? Bad dream or somethin’?”
Deku’s fussing now. And Katsuki can see the sweat starting to collect at his neck. Can see the way his green curls are sticking to his forehead when he rolls his chair over to the side of his bed and Deku throws himself onto his back.
“Nnngh,” Deku hums. Low and soft and so fucking sweet and almost makes Katsuki coo. Katsuki presses his palm against the heated freckled cheek of Deku’s face and he clicks his tongue when Deku starts panting. Pretty pink lips part with small gasps and hitched breaths. He’s raising his hips now, nuzzling his face against Katsuki’s large palm. “Nn — ngh.”
Deku’s blinking at Katsuki with those wide as fuck green eyes. His brows draw like he’s puzzled, then he’s blinking. Blinking and blinking and Katsuki feels like he’s almost being asked a question. Being tested or quizzed or fucking something.
Katsuki takes a second. Traces Deku with his eyes. Studies the sweat trailing down his neck and the deep flush around his nose and his ears. The way his hips are twitching up and up and his ears are flicking so fast now they look like they’re goddamn buzzing, and. He clicks his tongue.
“Oh baby,” Katsuki drawls, pressing his thumb into Deku’s cheek. Drags it all the way down to curve around his jaw and watches as Deku’s lifting his pelvis again. Rolling against nothing, humping the fucking air. And his gaze is stuck on the front of Deku’s pastel boxers. Color light and enough so Katsuki can see the darkened area because of how damp he is between his legs. His hand’s moving before he can think, ever present instinct to take care of Deku kicking in. Lifts himself from his computer chair to sit in the bed beside Deku, hovering over him. “Sweetheart, you’re soaked down here.”
Deku whines, high and breathy, head rolling back against the pillow and hips rolling up, pushing his pussy against the rough palm of Katsuki’s hand. Like he knows Katsuki’s finally got it, like he’s asking Katsuki to hurry, saying please please please and when the fuck does Katsuki ever fucking deny Deku.
“Yeah?” Katsuki presses his palm harder against the wetness, rolls the pads of his fingers into the damp lips, enough so they’re wet with the slick seeping through the fabric. “Like that, Princess? Wanna be touched, don’t you, sweet thing?”
“Kah—hahh,” Deku’s fingers are somehow slippery, hardly able to grasp at Katsuki’s wrist from where it’s between his thick freckled thighs, attached to fingers that are digging into his cunt.
Katsuki’s tongue swipes across his own bottom lip, tugs on it to stifle a groan at the amount of slick running down his fucking wrist. It’s gotta be a Quirk thing cause Deku is a goddamn faucet between his legs. Katsuki wants to fucking taste Izuku, he wants to be drowning in his sopping cunt and the thought has him rolling his own hips up against nothing.
“—chan, Ka- Kacchan,” Deku hums, voice sweet as ever.
“Yeah baby, what? Feel good? Like the way ‘m touching you?”
Pretty little thing with his eyes all wet and glazed over, lashes shiny with tears that clump them together. Make ‘em thick and pointy and all the more pretty. His cheeks are wet, both with sweat and his tears and Katsuki’s just gotta tug at the curls bouncing with the movements. Deku’s rolling his hips to meet the three fingers Katsuki has in his cunt. He’s still rubbing his head, nuzzling against Katsuki, anywhere he can get, ears going, twitching and flopping around — Katsuki wants to tug on one, see if it’ll get a reaction out of Izuku.
He’s so perfect. Holy fucking shit, Deku’s fucking gorgeous - Katsuki could cum just from watching Deku feel good. Always wants to eat him up a little more than he already wants to when he’s got his fingers inside of him, when he’s got Deku shaking through his tears for his release.
Katsuki takes the hand that’s cupping Deku’s cheek away so he can grip himself through his pants. He squeezes, applying pressure to his dick and feels pleasure shooting through him that makes his fingers curl inside Deku. His hand’s inside of Deku’s boxers now, drenched in all of Deku’s slick, his fucking sweet juice that Katsuki’s gonna get his fill of the second Deku cums all over his fingers.
“Kacchan, Kacchan, Kacchan,” Deku’s mumbling, always fucking mumbling, always fucking Katsuki’s name.
“Fuck yes, Kacchan’s the ones touching you like this, baby,” Katsuki half growls, voice rough, he feels fucking feral watching Deku come apart on his fingers. Twitching and drenched in sweat, sopping between his fat thighs. “Look at you, Sweetheart. All fucking mine. Fucking trembling on Kacchan’s fingers — you wanna fucking cum, bunny? Bet you taste so fucking sweet, gonna let me taste you? Yeah?”
“Kacchan, Kacchan,” Deku’s nodding - at least Katsuki thinks he is. His knees are shaking, thighs trembling and his toes are curling around Katsuki’s bed sheets. He tugs at them when he draws his legs up as he fucks himself in Katsuki’s thick fingers. His pretty chest is heaving, lips a little chapped with the amount of air he’s sucking into his dry throat. He’s still humming, tail twitching beneath his ass and his fingernails are sinking into the skin at Katsuki’s wrist. Enough to cut, enough to make him bleed a little and Katsuki fucking loves it.
He squeezes his dick, pumping in time with the fingers he’s got in Deku. Panting hot and wet at how fucking sexy Deku is when he feels good.
“There you go, Princess,” Katsuki breathes, rocking his hips into his palm. He’s so fucking sensitive, balls swollen and heavy from where they sit in his pants, dick pulsing against his thigh. He wants to fucking spill his seed in Deku and he’s rubbing quick circles over Deku’s swollen clit at just the thought, pressing until Deku’s whining, high and sharp with every press of Katsuki’s thumb, knuckles bumping against his soft walls. He wants to fucking fill Deku’s pussy to the brim. “That’s it, there’s a good bunny. Fuck yourself on my fingers, right? Feel good, baby? Gonna cum like this? All pretty, just for me, bunny?”
“Ah, ah, hahh, Kacchan—gonna—gonna— Kacchan!” Deku convulses when his orgasm hits him, tenses entirely on Katsuki’s fingers before his hips are jerking, sweet whines sounding from his throat, high but soft and mixing with Katsuki’s own noises when he’s cumming into his pants.
“Good job, baby, good bunny, so fucking good for me. You’re so fucking good.” Katsuki manages to get out. He smooths his hand over the inside of Deku’s thighs, rubbing gentle circles at the wet area, a little sticky and definitely sweet. Katsuki wants to lick it all up.
But Deku’s twitching still, lips still parted, eyes wet and glossy. Definitely not fucking there.
He settles for sealing his lips around his fingers coated in Deku’s cum. His spent dick twitches at the sweet taste of it and he moans around his fingers, his other hand squeezing at the meat of Deku’s thigh ‘cause he needs to do fucking something at how good it is.
“Taste so good, baby,” Katsuki mumbles, voice breaking with the dryness. He leans over Deku to press a soft kiss to his mouth, lets him taste himself. Though, he thinks Deku hardly even processes the fact that he’s on Katsuki’s tongue. Katsuki let’s his tongue run over the flat of Deku’s, drags as far back as he can to get Deku’s seed all over his own taste buds. Against his mouth, “See? Taste that? Fucking delicious, ain’t it?”
Deku’s panting against him, nods with a soft nose that makes Katsuki wanna fucking devour him.
And then Deku’s rubbing against Katsuki. His chest is going again, he’s humming and Katsuki feels one of Deku’s long ears flicker against his face. Katsuki realizes he’s not all that torn anymore. It’s still fucking Deku, still insatiable and ready to orgasm himself into overstimulation. His fucking Deku.
“Yeah, bunny? Wanna play again?”
Katsuki’s hand is already cupped between Deku’s legs.