'In Which Katsuki Learns What It Means to Fuck Like Rabbits'

CW: anthro, wolf!Katsuki, bunny!Izuku, a/b/o dynamics, marathon sex, intersex, size difference, slight dubcon, aged up

Katsuki and Izuku had been together their whole lives. When they started officially dating, +

things moved pretty fast. The two hybrids confessed their love to each other early on (everyone knew they'd been in love since they were tots), and had quickly moved from gentle kisses to making out to serious heavy petting and frottage. They were each other's first everything.+

Of course they ended up moving in together not long after. Katsuki knew Deku's heat was coming. He tried to keep track of it, which wasn't hard considering the tell-tale signs: Deku'd begun nesting, his appetite was up, and he was scenting Katsuki far more often. +

The two had a regular sex life, but Izuku remained demure. The alpha wolf refused to assume Deku'd wanna spend his heat with him yet. They were in love and lived together, yes, but they still hadn't claimed each other. And Katsuki was never one to bring such a thing up. +

So naturally, the alpha was surprised when his little lover asked him to spend his heat with him and to officially bond.

"You sure about that, Deku?" Katsuki worried he wouldn't be able to control himself around the omega's heat scent. He was already too territorial with Deku.+

"Of course! I can't imagine not being with you, Kacchan. But..."

Oh no. Here it comes, Deku's gonna ask him to wear a muzzle or--

"I'm worried about you..."

Katsuki braced for impact.

"I can be a...handful during my heat."+

Huh? What the hell was the nerd talking about? "Hah! You? Deku, it only takes a fucking kiss to shut you up!" The bunny hybrid had been shy bedroom wise. They made love and had passionate moments, but Deku was always very measured. In fact, the bun shut down Katsuki's advances +

fairly often. Hence, the alpha's internal turmoil. But what the fuck was the little nerd talking about? A handful? Hah! No way. Was this his way of saying he didn't think Katsuki could satisfy him?

He'd show that cute little fucker who could /really/ satisfy him.+

Deku looked up at him with worry in his big, green eyes. "Okay, well, don't say I didn't warn you."

So they began preparing for Deku's heat. They stocked twice as much food and water as Katsuki thought they would. And the sex toys, god the sex toys. Deku had an arsenal of toys.+

"Worried I won't be able to satisfy you still?" He pulled on his Deku's soft lop-ears.

"Kacchan, no! I... you'll see." The omega still seemed worried.

"How many boxes of condoms we need?"

"None, I'm on birth control," Izuku blushed fiercely, "and my omega won't allow it."+

"HAH! Creampie or nothing, huh?" Katsuki grabbed up his little lover and snuggled his nose in the fluffy, minty smelling locks. Katsuki would cream his Deku's little snatch as many times as he needed to in order to prove himself.+

Katsuki had no idea how many times he'd already creampied Deku. He swore it'd been at least three hours and the omega had stopped once to guzzle water. ONCE. The alpha was already exhausted, but he couldn't fight off the fierce little rabbit bouncing on his cock viciously. +

Deku's little pussy was swollen and dripping constantly, his tummy pooched out he was so full of cum. But he wouldn't stop. He had a crazed look in his eyes that only abated when he slammed himself down on his alpha's knot, the wet pop making him convulse and squirt all over.+

Katsuki just laid back and took it. What the fuck else do you do when your formerly shy lover starts ramming his cunt against your cock so hard you can feel his cervix?

"Alpha, alpha, mmmm, knot, cooo-come inside." Deku was practically feral, totally overtaken by his omega.+

"Alpha, cum now!!!" And god how Katsuki came. His dick hurt from the ordeal and it was only day one but his bunny was a sight to see.

His once docile lover was lost in the need to be bred full, fat ass and powerful thighs bouncing himself at absurd speeds on the 10 inch cock+

and massive fist sized knot that just so happened to be attached to Katsuki. It was a little scary, the alpha had to admit.

But then Izuku would settle himself on his alpha's knot, pussy spasming, and he'd reach up to stroke his alpha's velvety blonde wolf ears; +

Emerald would meet green and his tiny omega's floofy cotton tail would wag a mile a minute, thrilled to be getting stuffed full of his alpha's seed.

"Good alpha. Strong alpha. Breed me so good." Izuku scented the alpha now, rubbing a freckled cheek on anything he could reach.+

"That what you want, baby bunny? Want me to fuck you fat?"

"Mmmmm, yes! Gimme, alpha."

Katsuki yanked on a lop-ear & pulled Deku's cotton-tail hard. "Want me to ruin you with pups, baby?"

All of the sudden, Izuku looked possessed. Maybe Katsuki should've saved the dirty talk.+

"Yes! Now! Alpha fill omega with litter!!" The little bunny hybrid had started to fuck himself on the alpha's still fully inflated knot. Katsuki groaned, knot too sensitive. His cum splashed out everywhere, squishing out of Izuku's heavily creamed pussy with every bounce+

and still his omega chased his orgasm, no rest in sight. He was sure Izuku was going to have completely drained his alpha's balls by the end of his heat.

And it was only day one. Katsuki didn't know how he'd make it through the rest of Izuku's heat.

Whew! Been meaning to write this one for a while.

This is one of my all time favorite AU's and I could /definitely/ be persuaded into a continuation if you wanna buy me a coffee https://ko-fi.com/plushpeachy 

Continuation!! This one is for the incredibly generous Fish, you know who you are!

CW: see top of thread

It was day five and Deku's heat was finally starting to calm down a bit. They'd spent four days nearly non-stop fucking--no, breeding, there was no other word for it. +

Katsuki couldn't believe the endurance his little omega had. Yes, Deku was the number one hero and could fucking bench press his alpha without using his quirk, but he'd also always been Katsuki's little nerd.

Well, his little nerd bounced on his alpha's cock for nearly+

four days straight with only micro-breaks every few hours for eating, sleeping, and drinking.

On day two, Deku was so far gone that Katsuki had actually had to feed him by mouth. It got to the point where Katsuki was basically just a sex toy for the heat-crazed bunny. +

On day three, Deku's omega had finally decided Katsuki would make a suitable alpha. It was a fair bet that Izuku's cum-swollen belly and knot stretched pussy was enough proof that the alpha could breed him well. Katsuki would never forget the moment when they bit into each +

other's scent glands and felt an immediate connection, as though they were two ribbons now entwined together forever. He'd also never forget the earth-shattering orgasm the two had shared. That had actually been enough to put Deku down for about three hours. +

On day four, Deku's omega let Katsuki take control for a while as a show of submission. Of course, Katsuki couldn't keep up with his bunny's absurd stamina and once again ended up essentially being the omega's dildo the rest of the evening.+

It was day five that the alpha wolf could tell that Deku's heat frenzy was actually taking a toll on the omega's body and mind. After another thorough dicking, Katsuki carried his tiny, exhausted mate to the shower. His Deku had been unable to stand and cried out in desperation.+

"I've got you, baby bunny. Alpha's got you." Deku, throat wrecked and totally beyond words, could only warble out a whimper; the omega's small, scarred hands rubbed at his cum-stuffed tummy. Katsuki knew his omega was probably sore and cramping. "Let's clean you up." +

Deku whined pathetically, pulling on his own lop-ears as his alpha pressed on his lower belly and fingered the cum out of him. Katsuki was, at this point, unsurprised when his bunny actually orgasmed twice at the feeling of torrents of cum pouring out of his abused cunt.+

The wolf hybrid dried off his omega and blow-dried his curly mop and fluffy ears and cotton-tail. Deku had petted Katsuki's long blonde tail all the while, dazed by heat and comforted by his alpha's nearness.+

It only took 45 more minutes for Izuku to become completely heat crazed again. Katsuki's had reached his limit for a while, which the omega seemed to understand, so the alpha fucked him through a few orgasms on a very large knotted dildo to tide him over. +

Now, the omega was seated on Katsuki's face, wet pussy grinding hard and fast on the alpha's mouth. Katsuki lapped and sucked his baby's puffy folds, tongueing his fat clit occasionally.

Apparently that wasn't enough, because Deku started to push down on Katsuki's face, +

driving his pussy down on the alpha's tongue.

"Alpha, deep!" He still wasn't used to his once shy lover commanding him. It was kind of hot.

The alpha started tongue-fucking the omega's sopping pussy as deep as he could--which was pretty deep. Katsuki was way bigger than Deku.+

But still, Katsuki surmised, not deep enough. The bun began flexing and tightening his thick, muscular thighs around the alpha's face and Katsuki's life flashed before his eyes.

He'd seen his baby crush a watermelon between those thick-ass thighs. +

Katsuki grabbed at Deku's plush ass and started sucking his clit earnestly, which had the omega above him panting and actually crying. The alpha reached for a dildo and shoved it up his omega's dripping pussy hard and fast. His bunny froze in pleasure as he climaxed hard, +

only his floofy tail twitching and wagging ceasely. Knotted dildo tucked deep in the omega's pussy, Katsuki swooped up his Deku and swaddled him in blankets. It was fucking nap time.

"Good, good. Good, boy. Good, alpha," his omega nonsensically praised him through sniffles.

He understood now why his omega stayed on suppressants for as long as was healthy, and why he'd been so reluctant to share a heat with Katsuki. It was clear now that he'd never survive another heat with his Deku unless he was rutting.

And he /would/ be rutting next time.

WOWOWOWOWOW. I wrote a whole-ass fic here, y'all. Fish deserves it, though! I couldn't find your @ but shout yourself out if you see this!

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