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Izuku stared at his pet tiger hybrid where he was sitting in his loft, holding Izuku's phone out over the edge.
"Kacchan, no. Do not drop my phone."
Katsuki growled, striped tail twitching as he glared down at Izuku. He slowly leaned further over the edge, phone held loosely in his hand. "You know what I want, Deku."
Izuku sighed, rubbing his hands over his face. "Kacchan, we don't have time for this. You can't fuck me right now, we're meeting our friends at the beach in," he glanced at the TV idly displaying the time, "thirty minutes. Get down here and give me my phone."
Katsuki just growled louder. "I don't even want to go, you're just making me go."
"Kacchan," Izuku replied, irritated, "you have to go. It's part of your mandated rehabilitation. It's playdates or the muzzle."
"You bite someone one time and suddenly you're required to go on playdates ." He threw Izuku's phone, ignoring his annoyed shout when he fumbled and nearly dropped it.
"It wasn't just once, you bit three people. And two of them were vets." Izuku typed away on his phone, walking under Katsuki's loft towards the bedroom. "Get dressed, you're not going out like that."
Katsuki groaned loudly and climbed down from his loft, deliberately scratching the wood of the ladder with his claw on the way down. He followed Izuku down the hall, soft, barbed cock swaying gently between his legs as he walked.
He was bent provocatively over the bed, pussy on display as he sorted through his swimsuits. Katsuki licked his lips, sneaking quietly up behind him, and knelt down, licking a stripe up his cunt with his wide tongue.
Izuku gasped, back arching. Katsuki continued to lick his pretty pussy, ignoring Izuku's hand tugging on his ears trying to pull him away. He used his clawed hands to pull his lips apart, flicking his tongue against his already twitching clit.
"Kacchan," Katsuki had barely done anything and Izuku already sounded wrecked , "Kacchan, stop. I said no, we have to get ready."
A growl rumbled through him, vibrating against Izuku's clit, and making him clench around nothing. Izuku's hands were in his pale-striped hair, trying to pull him away again, so Katsuki wrapped his large hands around Izuku's hips and pulled him back away from the bed, causing him to fall face-first onto it.
Sharp teeth scraped against Izuku's cunt, biting hard enough to leave pretty, red marks framing it. His ears and tail flicked as Izuku moaned, cunt leaking against his face, spreading his delicious slick over his cheeks and nose.
Katsuki dragged a claw up Izuku's thigh, leaving behind another pretty welt, stopping his ascent to grab a handful of his fat ass. His tongue continued to work, alternating with his teeth, biting to mark and licking to soothe. Izuku's body jerked back, dripping a little when Katsuki used careful precision to bite his clit, piercing the hood and pressing his fang against it.
He sat like that, breathing heavy, hot breath against Izuku's swollen clit, occasionally dipping his clawed fingers into his cunt and scratching just the way he knew Izuku liked on the way out.
Izuku whined and tried to pull away again, but Katsuki only let him get far enough to turn him around and throw him fully onto the bed.
Izuku's pupils were blown wide and his face was flushed a pretty pink, freckles looking darker in contrast. His chest heaved, and Katsuki admired how pretty he looked like this. It was his favorite way to see his owner.
It was hard to resist, so Katsuki didn't; he leaned down, licking over one of his hard nipples, then bit down hard enough to leave a mark.
Izuku folded too easily; he arched against him, alternating muttering a scolding at Katsuki because 'we still have to get ready, Kacchan' and praise for how Katsuki was his 'pretty kitty'.
(He would never admit out loud how being called Izuku's pretty kitty made his heart (and dick) swell with happiness.)
Katsuki continued to mark his skin with his fangs and claws, trailing up his chest and over his shoulder, occasionally drawing blood and lapping it up. He would be covered in his marks by the time Katsuki was done with him, he would make sure of it.
His cock was fully hard now, barbs scraping on Izuku's cunt as he rutted against him, fat head catching his hole, threatening to slip in and fuck him 'til he only knows his Kacchan fucking him.
Katsuki nipped against the side of Izuku's neck, growling low in his throat, two claws pinching and pulling on a nipple, leaving it tender and oversensitive. He pulled back just slightly, making eye contact with Izuku; he still looked positively fucked out, drool leaking from the corner of his mouth and tears running down his cheeks.
Katsuki bit his plump cheek, smiling around it when he giggled. Izuku's hands were once again in Katsuki's hair, petting his round ears and massaging his scalp. If he could purr, he absolutely would be right now. He took the blissful opportunity to shove his cock into his owner's dripping cunt, eyes locked on Izuku's as he gasped and whined.
He immediately began pounding into him, giving him no time to adjust, spreading his legs wide to accommodate Katsuki's large body. Mercilessly he fucked into him, using his claws to write his name in Izuku's flesh.
Arms wrapped around his neck as Izuku panted and whined below him. Katsuki kissed him gently, once, twice, before using his large hand under Izuku's knee to push it into his chest in a half mating press. He braced one leg on the bed, pounding down into Izuku's hot cunt, soaking the bedding and the clothes beneath them in his slick.
Izuku's voice grew louder as he rolled his hips up, approaching his orgasm. Katsuki rutted harder against him, clawed thumb circling his clit, ever determined to get him there first.
"Gonna fucking breed you, gonna make you so fucking fat with my kits. Gonna stuff you so full of my cum it'll leak out of your stupid fucking swimsuit and everyone will know what a slut you are for your pet ."
Izuku keened underneath him, pulling Katsuki down by his ears into a sloppy, wet kiss. They didn't kiss often, Katsuki preferring to groom Izuku to show his affection, but when they did, it was all tongue and teeth and Katsuki biting Izuku's lips raw.
He did just that, and the two of them continued rutting into each other, covering each other's neck and shoulders in marks (Katsuki biting and Izuku sucking), falling into ecstasy with one another.
Katsuki could feel his cock start to swell, barbs flexing out and catching in Izuku's hot cunt, raking along his walls and spreading their mess of precome and slick on their bodies. He hunched over his owner, pressing harder into him, using his leverage to fuck himself impossibly deeper, wanting to be buried forever in Izuku's juicy cunt.
Izuku clenched around him, full body tensing, and Katsuki was a goner after that. He began to cum, pumping his hot load deep into Izuku, stuffing him full as promised. He bit down on the juncture of Izuku's neck and shoulder one last time, breaking skin and drawing blood, leaving his mark clearly and deeply for everyone to see.
Izuku pressed up against him, against his thumb still rubbing his chubby clit, rolling his hips in circles to make himself cum, pussy squirting and locking around Katsuki.
They sat like that for a little while, just breathing each other in and winding down. Eventually, Katsuki's cock softened enough to pull out without the barbs hurting Izuku (or pulling out too much of his cum), and his legs gave out, dropping to his knees in exhaustion.
Katsuki spread out on the floor, softening cock bobbing against his navel. He watched from the corner of his eye as Izuku sat up, hair mussed and face still flushed, teeth marks and raised scratches littered all over his body. Katsuki turned to face him just as he began to speak.
"You… I cannot believe you. I told you no and you did it anyway."
Katsuki smirked up at him. "You didn't seem to mind."
He narrowed his eyes. "I should put the muzzle on you anyway," Izuku threatened, glaring at him.
Katsuki growled, large fangs flashing, ears tilting back, tail whipping behind him. He hated the muzzle. Izuku knew that, so he would never use it, but the threat was still there. Izuku rolled his eyes at him, standing from the bed and walking over to Katsuki.
He stood over him, essentially straddling his head, and looked down on him. Generally, Katsuki hated being looked down on, hence the loft in the living area where he liked to hang out, but this angle was hot . Izuku's swollen, abused pussy was directly in his line of sight, dripping slick and Katsuki's own cum down his thighs and onto Katsuki's face.
He felt his cock start to twitch in interest again, and actually whined when Izuku stepped over him and made his way to the attached bathroom.
"You got what you wanted, now get dressed, Katsuki. You're not going out like that. If I come back from cleaning myself up and you're still naked, you're getting the collar, leash, and muzzle."
Katsuki groaned, letting his head fall back to thud on the floor. He rolled over and got to his feet, not bothering to clean up as he pulled loose shorts on and licked his hand to wipe his face clean. If he was being forced to go on these 'playdates', he was going to show up smelling like sex.
Izuku and Katsuki made it to meet their friends on time, despite all odds. Izuku was wearing Katsuki's favorite bikini, a floral set that barely covered his nipples and pussy. It was perfect, because it showed off all of Katsuki's hard work. He was smug, basking in the uncomfortable aura of Izuku's friends as they tried very hard not to make eye contact with him or stare at Izuku's body; the bite marks littering his thighs, the scratches covering his torso, his absolutely swollen pussy noticeable through his swimsuit.
Izuku had made him take a quick shower, washing away the delicious smell of sex surrounding the both of them, and had made sure to put his thick collar on him before leaving their apartment.
Katsuki may have grumbled and growled and complained the whole time, but in the end, Izuku owned his heart, and he really loved his owner.