Katsuki Bakugo x bunny! fem! reader x Izuku Midoriya
TW/CW: 18+, smut with plot! surprise, discussions of coercive and violent pornography, established polyamorous relationship, breeding kink, hybrids, MMF threesome, DP, p in v, creampies, my own personal opinions on heteromorph/hybrid struggles in universe, dirty talk, dumbification, degradation, praise, dominant! Katsuki, switch! Izuku, submissive! reader, long intro, heat cycles (technically but not referred to as such?), loooooooong. Way more, I'm actually concerned, please tell me if something really needs a TW that I forgot.
A/N: this nearly made me insane writing it but i had so much to say 7k words I guess :P
The feelings were perfect tonight, soft blankets layered just right, pillows arranged in that specific configuration that made your instincts purr with satisfaction. You were tucked between Katsuki and Izuku on the couch, your show playing on the screen, though you'd stopped paying attention three episodes ago.
Your skin felt too tight. Hot. Like something was crawling beneath the surface, demanding to get out.
You shifted again, pressing closer to Katsuki's side, breathing in his burnt sugar scent. It helped. A little. But not enough.
"You good?" Katsuki's voice rumbled against your ear where you'd pressed it to his chest.
"Mhm." The lie tasted bitter on your tongue.
You weren't good. You'd been fighting this feeling for over twenty-four hours now, and it was getting worse. The urge to let go, to stop thinking, just to be what your body was screaming at you to become, was overwhelming.
But you couldn't. You wouldn't, not after what you'd seen.
Your phone had been innocent enough at first, just curious research about bunny hybrids, about what it meant when the instincts got too strong. But the search results had been a nightmare. Video after video of bunny hybrids in their "native state", reduced to mindless, desperate things while regular folk used them, laughed at them, treated them like living sex toys. The comments had been worse. Look at the dumb bunny, can't even think. This is what they're good for. Stupid breeding sluts.
Your stomach churned at the memory.
"Bun- hey." Izuku's hand touched your shoulder, and you flinched. "You're shaking."
Were you? You looked down at your hands. They were trembling.
"I'm fine," you whispered, but your voice cracked.
The heat was building. Your thighs pressed together involuntarily, seeking friction, seeking something. Your ears flattened against your head as shame flooded through you. Not here. Not in front of them. They couldn't see you like that; mindless and desperate and stupid.
"Bullshit." Katsuki sat up straighter, forcing you to move with him. His red eyes narrowed as he studied your face. "You've been weird all day. What's going on?"
"Nothing, I just-" Your breath hitched. The burning sensation was spreading, pooling low in your belly, making your thoughts fuzzy at the edges. "I need- I think I need to be alone for a bit."
"Alone?" Izuku's green eyes widened with concern. "Are you feeling sick? Do you need-?"
"Please." The word came out as a whimper, and you hated yourself for it. "Please just, both of you need to leave. Right now."
Katsuki's hand caught your wrist as you tried to pull away. "Like hell we're leaving when you're-"
"Please!" Your voice broke completely, tears burning at the corners of your eyes. "I can't, you can't see me like this, please, just go-"
You wrenched yourself away from both of them, scrambling deeper into the nest, pulling blankets over yourself like they could hide what was happening. Your whole body was on fire now, every nerve ending screaming. The urge to submit, to present, to breed, it was taking over, and you were terrified.
"Bunny." Katsuki's voice had gone dangerously soft. "What the fuck is going on?"
You buried your face in a pillow, trying to muffle the desperate sound that wanted to escape your throat. Your hips were moving on their own, seeking friction against the blankets. No, no, no-
"I think," Izuku's voice was tight with worry. "Kacchan, I think she's going into some kind of hybrid heat or-"
"It's not heat," you managed to gasp out. "It's, I'm going native."
Then Katsuki: "The fuck does that mean?"
You couldn't answer. Couldn't form words anymore. Your mind was slipping, thoughts scattering like dandelion seeds in the wind. All you could focus on was the need, the overwhelming instinct to find your mates and-
"Bunny, talk to us." Izuku was closer now, his hand hovering near your blanket cocoon but not touching. "Please, we want to help, but we don't understand what's happening."
"Can't." Your voice was barely recognisable, thick with need. "You have to leave. Don't want you to see me like- like those videos-"
"Videos?" Katsuki's tone sharpened. "What videos?"
You shook your head frantically, ears pressed flat. "The ones online. Bunny hybrids going native. They're, they lose themselves, just, just breeding. And the people, they-" A sob caught in your throat. "They laugh. They use them. I don't want you to see me reduced to- to some mindless animal who-"
"Hold the fuck up." Katsuki's hand was suddenly on your shoulder, firm and grounding despite the blankets between you. "You think we'd do that to you?"
"I don't know!" The confession tore out of you. "I don't know what happens when I let go! What if my mind just goes? What if I'm nothing but instinct, and you-"
"Izuku." Katsuki's voice cuts through your spiral. "Phone. Now. Find out what the fuck 'going native' actually means."
You heard rustling, the sound of rapid typing. Your body was betraying you completely now, arousal dampening your thighs, your cotton shorts suddenly unbearably restrictive. You whimpered into the pillow, trying desperately to hold onto your thoughts, your self.
"Okay, I found, oh." Izuku's voice went strange. "Oh, that's... Katsuki, look at this."
"The search results. It's all, it's all porn. Exploitative porn." Izuku sounded sick. "There's barely any actual medical information; it's buried under all this, these videos of bunny hybrids being,"
"Fucking hell." Katsuki's grip on your shoulder tightened. "That's what you saw? That's why you're scared?"
"Okay. Okay, listen to me." Izuku's voice was closer now, steady despite the tremor underneath. "I found an actual medical article. Going native is- it's a natural state for bunny hybrids. It happens when you suppress your instincts for too long. Your body forces you to let go, to stop overthinking and just... be."
"And it's not- you're not mindless. You're still you, just more instinct-driven. You can still communicate, still make choices, you're just-" Izuku paused. "More vulnerable. More trusting. And you produce a pheromone that's highly aphrodisiac to partners you've bonded with."
"Are people taking advantage of hybrids in a vulnerable state?" Izuku finished, anger creeping into his tone. "People who shouldn't be trusted with them in the first place."
You felt something crack open in your chest. Still you? Still able to choose?
"Bunny." Katsuki pulled the blanket down enough to see your face. His expression was fierce, protective. "Look at me."
You met his eyes, your own blurred with tears.
"We're not those fuckers in the videos," he said flatly. "We're not gonna laugh at you or use you or treat you like a fucking toy. You're our girlfriend. You think we'd hurt you?"
"I know." His thumb brushed away a tear from your cheek. "But you don't have to be. Not with us."
"The article says fighting it makes it worse," Izuku added softly. "You've been suppressing this for over a day? Bunny, you must be in so much pain."
You were. Your whole body ached with the effort of holding back, of staying in control, of staying you.
"Let go," Katsuki said. "We've got you."
"No what-ifs." His hand moved to cup your face. "You trust us, or you don't. Which is it?"
Did you trust them? These two boys who'd spent months proving they loved every part of you? Who built you this nest, who learned your comfort foods, who never once made you feel like less than human?
Yes. God, yes, you trusted them.
"Okay," you whispered. "Okay, I'll try."
"Don't try." Katsuki's lips quirked. "Just let go. We'll catch you."
It was like releasing a breath you'd been holding for too long. The moment you stopped fighting, the instincts rushed in like a flood. Your mind didn't disappear; it just shifted. Simplified. Everything became about sensation, about need, about the two males in front of you who smelled so right.
A sound escaped your throat, something between a whimper and a purr. Your body moved on its own, pushing up onto your knees, the blankets falling away. You could feel how wet you were, could smell your own arousal mixing with something sweeter, headier.
The pheromone. Your native scent.
Katsuki inhaled sharply, his pupils dilating. "Fuck."
"It's strong," Izuku breathed, and you could see the effect it was having on him too, the flush spreading across his freckled cheeks, the way his breathing had quickened.
You reached for them, a needy sound building in your chest. Wanted them close. Wanted them now.
"Easy, easy." Katsuki caught your hands, but there was something sharp in his grin now, something almost cruel. "Look at you, already falling apart, and we haven't even touched you yet. Such a pathetic little thing." He brought your trembling hands to his chest, holding them there with firm pressure. "What's wrong, bunny? Lost all that control already? Can't even hold yourself together for five seconds?"
The word should have stung, but instead it made you whimper, made you press closer. Yes, pathetic, desperate, needed them-
"Poor baby," Izuku cooed, his hand stroking down your arm in a way that was both soothing and condescending. "You've been trying so hard to hold it together, haven't you? But your body won't let you anymore. It's okay. We know you're just a helpless little bunny who's lost all sense."
Could you still talk? You tried to form words, found them slippery but not impossible. "Need you. Both. Please."
"Of course you do." Katsuki's voice dripped with mock sympathy. "Look at her, Deku. Already begging and we haven't even gotten her clothes off. Bet she's already soaked through her shorts like a bitch in heat."
You whimpered at his words, your thighs pressing together. He was right. You were.
"Touch me," you managed to gasp out. "Need to be filled. Need-" You pressed your thighs together harder, and a fresh gush of arousal dampened your skin. "Hurts. Empty. Please, please-"
"Shh, I know, I know." Katsuki's hands moved to the hem of your shirt, but he was taking his time, deliberately slow. "Such a wrecked little thing, all worked up and aching. Can't even wait, can you? So fucking gone for us." He stripped away your shirt with agonising slowness, then your shorts, leaving you completely bare before them. "Jesus, look at this mess. You're dripping, baby. Made such a mess of yourself and we've barely touched you. Brainless little bunny can't even control her own body."
The cool air on your overheated skin made you gasp, your nipples already hard and flushed, your thighs damp with arousal. You could feel how swollen you were, how ready, how utterly exposed and vulnerable.
"Beautiful," Izuku murmured, but there was something clinical in the way he catalogued every detail, the flush spreading across your skin, the way your entrance glistened and clenched around nothing, the tremor in your limbs. "Look how responsive she is. Completely overwhelmed, aren't you? Poor thing. Youâre still trying to answer?"
"Who do you want first, baby?" Katsuki asked, tilting your chin up to meet his gaze. His tone was gentle, almost sweet, but his eyes were dark with cruel amusement. "Who's gonna fill up this aching little cunt first? Come on, use your words. I know it's hard when you're this far gone, but try for me."
You looked between them, your mind too hazy to process clearly. Izuku was watching you with those intense green eyes, his analysis quirk probably cataloguing every reaction, every tremor, every desperate sound. Katsuki was coiled with tension, holding himself back with visible effort, but there was something predatory in his smile, the smile of someone who was going to enjoy every second of watching you fall apart.
"Izuku," you decided, because Katsuki's control was already fraying and you needed the steadier one first. "Please, Izuku, I need-"
"I've got you." He was already moving, stripping off his shirt with fumbling hands. "Tell me if anything's too much, okay? Promise me. I know your head's all fuzzy right now, but try to remember you can still talk."
You nodded frantically, but the words were already slipping away, the need overwhelming everything else.
Katsuki helped position you, his hands firm and possessive on your hips as he guided you to straddle Izuku's lap. "Gonna watch," he said roughly, settling behind you, his chest against your back. "Gonna make sure he takes care of my girl right. Make sure he fills you up proper. And I'm gonna enjoy watching you lose your fucking mind on his cock."
Izuku's hands settled on your waist, and you could feel him hard against you, his cock straining against his boxers. You whined, grinding down shamelessly, seeking friction, and he groaned at the contact.
"Look at her," Katsuki laughed, cruel and fond. "Can't even wait for him to get his pants off. Grinding on him like an animal. So fucking gone."
"Okay, okay," Izuku's voice was strained as he freed himself, his length springing up between you, flushed dark and leaking. "I've got you, just-"
The first press of him against your entrance made you keen, high and needy. Yes, yes, this was what you needed. You didn't wait, didn't ease down slowly; you just sank onto him in one smooth, desperate motion. The stretch was exquisite, almost too much, his cock sliding through your sopping folds, parting your swollen flesh, filling you inch by inch. You could feel every ridge of him, every vein, the way your inner walls stretched and clenched around his length. The fullness was exactly what your body had been crying for, and you moaned brokenly as he bottomed out inside you, his tip pressing against something deep that made stars burst across your vision.
"Fuck," Izuku gasped, his head falling back against the nest. "You're so, so wet, so hot, gripping me already,"
"Look at her go," Katsuki cooed from behind you, his hands settling on your hips with bruising pressure. "Already bouncing on his cock like a whore. Can't even wait, can you? Just an empty-headed little slut who needs to be filled. Completely mindless."
You didn't wait. Couldn't wait. Your hips started moving immediately, rising and falling in a desperate, graceless rhythm. The slide of Izuku inside you was heaven, his length dragging against your inner walls, the friction building with every movement, the wet sounds obscene in the quiet room. You could feel every ridge, every vein, the way he stretched you open. Slick dripped down his shaft with every thrust, pooling at the base where your bodies met, making everything slippery and easy.
"Slow down," Katsuki's voice cut through the haze, his hand catching your hip and forcing your pace to slow. "You're gonna hurt yourself, dummy. Let him adjust. Poor Deku can't keep up with how frantic and stupid you are right now."
You whimpered in protest, your hips trying to move faster, trying to chase that friction, but his grip was iron. He controlled your movements, making them slower but deeper, forcing you to feel every inch of Izuku inside you, making you grind down until his pubic bone pressed against your clit.
"There we go," Katsuki murmured, his voice dripping with condescension and dark affection. "Take your time. Milk him nice and slow. He's not going anywhere, and neither are we. We've got all night to play with our helpless little bunny. Gonna watch you fall apart over and over until you forget your own name."
Izuku's hands gripped your waist, his fingers digging in as he fought for control. "Kacchan, the pheromone," he gasped, his voice already strained. "It's really strong, I don't know how long."
"You'll last as long as she needs," Katsuki said firmly, almost sing-song with cruel certainty. "Focus. Breathe through it. Our poor Deku, so overwhelmed already and we've barely started. Look at what our brainless little bunny does to you."
You could only whimper in response, your body moving in the rhythm Katsuki dictated, slow, deep, thorough. Every downstroke took Izuku deeper, made you feel the stretch, made your inner walls flutter and clench around him. Every upstroke dragged against that sensitive spot inside that made your thighs shake.
But you needed- the instinct was screaming at you to move faster, to chase that peak, to be bred properly.
"Please," you whimpered, "please, I'm aching, faster-"
"Aw, poor baby," Katsuki cooed mockingly. "Your head's completely empty, isn't it? Just a wrecked little thing who needs to be fucked senseless. But you're gonna take what I give you, understand? You're gonna be good and let Deku adjust to that tight little cunt of yours."
"Katsuki," Izuku panted, his voice strained and desperate, "the pheromone is, it's really strong, I'm not sure I can,"
"You'll manage," Katsuki repeated, his tone dripping with patronising certainty. "Focus. Breathe through it. Our poor Deku, completely undone by how much she craves him. Such a good boy, trying so hard to hold back for our aching little bunny."
You were making sounds you'd never made before, little chirps and whimpers and desperate bunny noises that should have embarrassed you but didn't. Nothing mattered except the feeling of Izuku inside you, the way his cock dragged against your inner walls with every controlled movement, the scent of both your mates surrounding you, claiming you.
Your walls began to flutter around him as the pressure built, that coil of heat tightening in your core. Izuku groaned at the sensation, his hips jerking upward involuntarily before he caught himself, trying desperately to maintain the slow rhythm Katsuki had demanded.
"Good girl," Katsuki cooed, his hand stroking your hair with mock tenderness while his other kept your hips pinned in that maddening rhythm. "Feel how he's struggling? Feel how hard you're making it for him to control himself? Such a wrecked little thing, squeezing him like that. Bet you can't even help it, can you? Just your body doing what it wants."
Your first climax hit suddenly and hard, your entire body going rigid as your walls clenched around Izuku in rhythmic, desperate waves. The sensation was overwhelming, your inner muscles gripping and releasing his length, milking him as more arousal gushed around his shaft, making everything even wetter. You cried out, a sound somewhere between a moan and a chirp, your back arching as pleasure crashed through you.
"Oh fuck," Izuku's voice broke, his hands gripping your waist so hard you knew there would be marks. "She's, oh god, clenching so tight around me, every pulse,"
"Easy, Deku," Katsuki commanded, his voice almost sing-song with condescension. "Don't you dare bust yet. She's just getting started, and you're gonna give her everything she craves. Look at her, still so frantic, still so empty inside even with you filling her up. Poor thing doesn't even know what she wants."
The orgasm subsided but didn't fade completely, leaving you trembling and gasping and somehow even more desperate. Your hips immediately started moving again, faster now, more frantic, chasing something you couldn't name. Izuku's cock slid through your slick folds with obscene wet sounds, the friction building again almost immediately. You could feel every ridge of him, every vein, the way his tip pressed against that sensitive spot deep inside that made stars burst across your vision with every thrust.
"Please," you whimpered, "please, more,"
"That's right, use him," Katsuki murmured, his voice dripping with affection and mockery. "Ride him like the wrecked little bunny you are. Wring him dry, sweetheart. He's here for you. Gonna let you fuck yourself senseless on his cock until you forget your own name."
Your second orgasm built faster than the first, your walls already hypersensitive and eager, clenching around every thrust. When it hit, it was even more intense, your entire body convulsing around Izuku's length, your inner muscles clenching in desperate waves that seemed to go on forever. More of your juices flooded around him, making the slide even easier, even more obscene. You could feel it dripping down his shaft, pooling at the base where your bodies met, soaking into the nest beneath you.
"Kacchan, please," Izuku was begging now, his voice wrecked and desperate, his hips thrusting up to meet yours despite his attempt to maintain control. "I can't, she's gripping me so tight, so wet, I'm losing it,"
"You can and you will," Katsuki said firmly, though his voice was thick with arousal. "Look at our poor Deku, completely undone by how much she craves him. Such a good boy, trying so hard to hold back. But she's not done with you yet, is she, sweetheart? Still so frantic, still so hungry. The brainless little bunny wants to be bred."
The third orgasm rolled into the fourth, and you lost count after that. Each one seemed to trigger the next, your body caught in a cycle of pleasure so intense it was overwhelming. Your walls never fully relaxed, just kept clenching and releasing around Izuku's cock in an endless rhythm. The sounds were obscene, wet, rhythmic, desperate, your slick making every movement slippery and easy, the nest beneath you soaked.
Izuku was trembling beneath you, his freckled face flushed deep red and damp with sweat. His green eyes were glazed, unfocused, his jaw clenched so tight you could see the muscle working. Pre leaked steadily from his tip, mixing with your arousal, making everything even wetter, even more of a mess.
"Good, so good," Katsuki cooed, his hands kept your hips moving in that relentless rhythm. "Look at how well you're using him. Such a good bunny, milking his cock so beautifully. Poor Deku doesn't even know what to do with himself. You've fucked him senseless, baby. Made him just as empty-headed as you are."
"Kacchan," Izuku's voice was barely a whisper now, completely wrecked. "Please, I'm so close, can't hold,"
"Not yet," Katsuki commanded, cruel and fond. "She's still hungry for you. Look at her, still clenching, still frantic. You're gonna keep going until she's satisfied, understand? Gonna let our aching bunny use you until she's had enough."
Somehow, impossibly, Izuku obeyed. His hips continued their upward thrusts, meeting your downward grinds, his cock sliding through your arousal heat over and over. You could feel him trembling with the effort of holding back, could feel the way his muscles were locked tight, could feel the desperation radiating off him in waves.
Your fifth, sixth, seventh orgasm blurred together, each one sending fresh waves of pleasure through your body, each one making you clench around him harder, each one drawing desperate sounds from both of you. Your inner walls were so sensitive now, so responsive, that even the smallest movement sent sparks of pleasure racing through you. You were babbling now, incoherent pleas and whimpers, your mind completely gone.
"Please," you finally whimpered, and you weren't sure if you were begging for more or for mercy. "Please, Izuku, I'm so-"
"Let him cum," Katsuki decided, his voice dripping with satisfaction. "You've wrung him dry enough for round one. Such a good boy, holding back for so long. Time for his reward. Fill her up, Deku. Give our aching bunny what she wants."
Izuku's relief was palpable, almost visible. His rhythm faltered immediately, became erratic and desperate, his hips thrusting up into you with single-minded intensity. His hands gripped your waist so hard you knew there would be bruises, and then he was spilling inside you with a broken, desperate moan.
The sensation of him coming undone inside you was exquisite; you could feel his cock pulsing, feel the warmth of his release flooding into you in thick spurts, feel the way his entire body shook with the force of his release. His spend was hot and thick, filling you up, and the feeling made you purr, some deep instinct satisfied by the sensation of being claimed, being filled, being bred by your mate.
But the need was still there. Dimmed but not gone. Still burning under your skin.
You looked at Katsuki with hazy eyes, your mind too far gone to form proper words. "You?"
His grin was sharp and dangerous and cruel. "Thought you'd never ask, bunny."
He moved fast, pulling you off Izuku's lap with rough hands and flipping you onto your back in the nest. You went willingly, pliant and trusting, your legs falling open in shameless invitation. Your entrance was still glistening with Izuku's cum, your inner thighs aroused and wet, your body completely open and ready for him.
"Fuck, look at you," Katsuki breathed, settling between your thighs. His eyes were already darkening, pupils dilating as your pheromone washed over him in full force now. "All messy and wrecked. Dripping with Deku's cum. This what you craved? To be fucked senseless by your mates? To be used like a good little breeding bunny?"
You nodded frantically, beyond shame, beyond thought. Yes, yes, exactly that.
"Then hold on, bunny." His voice dropped to a growl. "Because I'm not gonna be as gentle as Deku. Gonna fuck you like the desperate slut you are."
The moment Katsuki pushed inside you, the pheromone hit him like a physical force. You watched his face transform, his eyes going almost completely black, pupils blown so wide there was barely any red left, his jaw clenching so hard you could see the muscle working. A low, feral growl rumbled from his chest as he sank deeper, and you felt him shudder violently at the sensation of your tight, wet heat wrapped around him.
"Oh fuck," His voice was already wrecked, barely recognisable, almost inhuman. "Oh fuck, baby, your scent, it's- I can't, my head's going,"
He bottomed out inside you with a harsh, brutal thrust, and the sensation was overwhelming. He was thicker than Izuku, longer, and the stretch was almost too much, almost painful. But your body welcomed him eagerly, your walls clenching around him in desperate waves, drawing him deeper, trying to keep him inside. You could feel every ridge of him, every vein, every inch of his thick length stretching you open; the way his tip pressed against that sensitive spot deep inside made stars burst across your vision.
"Gripping me so tight," Katsuki gasped, his hips already moving in erratic, desperate thrusts. "So fucking tight and wet and perfect, your scent is destroying me, bunny, losing my mind, can't breathe, can't, fuck,"
He pulled almost all the way out, and you could feel the drag of his cock against your sensitive walls, and then he slammed back in with a force that knocked the breath from your lungs. The sound was obscene, wet, rhythmic, desperate, your arousal making every movement slippery and easy. His cock dragged against your inner walls with every thrust, hitting that sensitive spot over and over with brutal precision, and you cried out with each impact, your voice breaking.
"Good, yes," Katsuki panted, his hands gripping your hips so hard you knew there would be bruises, marks that would last for days. "Take it, take all of me, you aching little thing, been waiting for this, haven't you? Waiting for me to fill you up proper? Waiting for me to fuck you senseless?"
"Yes," you whimpered, "yes, please, more,"
"More?" His laugh was almost feral, completely unhinged. "You want more? Greedy bunny. Brainless little slut. I'll give you more. Gonna fuck you until you forget your own name."
He set a brutal pace, his hips snapping against yours with single-minded intensity, with a violence that should have scared you but instead made you clench around him harder. The friction was exquisite, his length sliding through your arousal heat, your walls gripping him desperately, the pressure building with every thrust. You could feel the way he was losing control, the way the pheromone was stripping away his ability to think, leaving only instinct and need and the desperate urge to breed.
"Gonna breed you," Katsuki growled, his voice dropping to something almost inhuman, almost animalistic. "Gonna fill you up so full, gonna make sure you're carrying my cum all night, you're ours, bunny, you're our girl, and I'm gonna make sure you know it, gonna fuck you until you can't walk, until your head's completely empty, until all you know is my cock inside you."
The dirty talk should have embarrassed you, but instead it made you clench around him harder, made you moan and arch and beg for more. This was what you needed, to be taken, to be claimed, to let go completely and trust that they'd take care of you, that they'd use you exactly how you needed to be used.
"Fuck, you're squeezing me so tight," Katsuki's thrusts became more erratic, more desperate, more violent. "Can't hold, your scent, your body, everything about you is, I'm gonna, fuck, I'm gonna,"
He slammed deep one final time, grinding against you as his entire body went rigid. You felt his cock pulse inside you, felt the warmth of his release flooding into you in thick, hot spurts that seemed to go on forever. He came hard, harder than you'd ever felt, his hips jerking involuntarily as he spilt everything inside you, and the sensation made you clench around him, milking him, drawing out every last drop.
"Oh fuck, oh fuck," Katsuki's voice was completely wrecked, barely a whisper. "So good, so perfect, taking it all, such a good bunny, such a perfect little breeding slut,"
He collapsed against you, his forehead pressing into your neck, his breathing ragged and desperate. But even as he came down from the high, you could feel him still inside you, still hard, already beginning to pulse with renewed need. The pheromone was affecting him too strongly, keeping him in a constant state of arousal, wrecking him.
"More," you whimpered, your hips already moving, seeking friction, seeking more of him. "Please, still aching."
Katsuki pulled back just enough to look at you, and his eyes were still almost completely black, pupils blown wide with need and desperation. A thin sheen of sweat covered his skin, and his breathing was still ragged, still desperate.
"Jesus Christ," he breathed, but he was already moving again, his hips thrusting back into you with renewed intensity. "How many rounds does going native last?"
"The article said," Izuku's voice was hoarse, wrecked, ", said it varies. Could be hours. Could be all night."
You whined at the thought, the sound high and needy. All night. Yes. Craved that. Needed them to use you all night.
"Okay." Katsuki pulled out, ignoring your sound of protest, your desperate whimper. "New position. Deku, you recovered enough to go again?"
You looked over at Izuku. He was flushed and panting, but his eyes were dark with renewed arousal, his cock already half-hard again. The pheromone was affecting him too, you realised. Maybe not as strongly as Katsuki, but enough. Enough to keep him desperate for you.
"Yeah," Izuku said, his voice rough. "Yeah, I can. What did you have in mind?"
Katsuki's grin was wicked, cruel, and predatory. "Both of us. At the same time. Gonna see if our aching little bunny can take both her mates at once."
Your mind was too hazy to process what that meant fully, but your body understood. You felt yourself clench around nothing, a fresh wave of arousal dampening your thighs. Yes. Both. Craved both. Needed to be filled.
They positioned you carefully, Izuku on his back, you straddling him, Katsuki behind you. You sank onto Izuku first, the familiar stretch making you sigh with relief, with satisfaction. Then Katsuki's hands were on your hips, guiding you forward, and you felt him press against where you were already filled, feeling the fat head of his cock seeking entrance.
"Gonna be tight," Katsuki warned, his voice dropping into that cooing tone that made your instincts purr despite the overwhelming sensation. "Look at you, already so full, and we're just getting started. Such a greedy little bunny, wanting both of us at once. Bet your head's completely empty now, isn't it? Just a wrecked little thing who needs to be stuffed full."
He pushed in slowly, and the stretch was unlike anything you'd ever experienced. Your entrance burned as he pressed alongside Izuku, the two of them taking up every inch of space inside you, stretching you impossibly wide. You could feel them both, Izuku's length pressing against your front wall, Katsuki's cock sliding in beside his, both of them impossibly thick, impossibly deep, filling you so completely you couldn't breathe.
"Oh fuck," Izuku's voice was wrecked, his hands gripping your waist with desperate strength. "Kacchan, I can feel you, right there against me, your cock,"
"Shh, I know," Katsuki growled, his voice thick with arousal and that patronising affection. "Look at her taking us both. Such a perfect little hole, stretching so wide for her mates. You're doing so good, baby, so fucking good. Taking both of us like the desperate breeding slut you are."
The stretch was almost too much, your body burning as it accommodated both of them, as it stretched impossibly wide. But your arousal made it possible; you were so wet, so open, so completely ready for them that your body welcomed the invasion despite the burn. You could feel every ridge of them both, every vein, the way they pressed against each other inside you, separated only by the thin wall of tissue, grinding together with every small movement.
"She's so tight," Izuku whimpered, his hips jerking involuntarily. "Kacchan, I can feel you, oh god,"
"That's right," Katsuki cooed, his voice dripping with condescension and love and cruel satisfaction. "Feel how beautifully she takes us both. Feel how her little cunt is squeezing us so tight. Our aching bunny, so desperate to be filled, so desperate to have both her mates inside her at once. Bet your head's completely gone, isn't it baby? Just a brainless little bunny who needs to be bred."
He bottomed out, and the sensation was overwhelming, almost painful. You were so impossibly full, stretched so wide that you could barely breathe, could barely think. Both of them were pressed deep inside you; you could feel them both pulsing with need, could feel the way they were grinding against each other.
"Okay?" Katsuki asked, keeping your hips pinned. "Can you take us, baby? Can you take both of us? Or is it too much for your empty little head?"
You nodded frantically, unable to form words, unable to think. Yes. Yes, you could take them. You craved to take them. Needed this.
They started moving together, finding a rhythm that had you seeing stars, that had you crying out with every thrust. Izuku thrust up while Katsuki pulled back, then reversed, their movements perfectly synchronised. Every thrust pushed them deeper, made them grind against each other inside you, and the sensation was indescribable. You could feel them frotting against each other, their cocks sliding past each other inside your tight heat, separated only by that thin wall, grinding together with every movement.
"Look at her," Katsuki panted, his voice rough with need. "Look at how she's taking us both. Such a good girl, such a perfect little bunny. Milking us so good. Your head's completely empty, isn't it? Just a brainless little breeding slut."
Your walls clenched around both of them in response, and the sensation made both boys groan, made them thrust harder. You were squeezing them so tight, your inner muscles gripping and releasing in desperate waves, drawing them deeper, trying to keep them inside. Your juices gushed around them with every thrust, making the slide even easier, even more obscene, soaking everything.
"She's so wet," Izuku gasped, his voice completely wrecked. "So hot, gripping us both, I can feel your cock grinding against mine."
"Shut up and fuck her," Katsuki growled, but there was no heat in it, only desperate need. "Focus on her. Make sure our aching bunny gets everything she craves. Gonna fuck her senseless, gonna make sure she forgets her own name."
They increased their pace, their thrusts becoming more erratic, more desperate, more violent. The sensation was overwhelming, both of them moving inside you, their cocks sliding past each other, grinding against each other, filling you so completely that you couldn't think, couldn't breathe, could only feel. Could only take what they gave you.
"Perfect, yes," Katsuki cooed, "Take it all, baby. Take both of us. You're doing so good, such a perfect little thing, taking your mates so beautifully. Such an empty-headed little bunny, lost completely, aren't you? Just need to be bred."
"Oh fuck," Izuku's voice broke, his hands gripping your waist so hard you knew there would be bruises. "She's clenching around both of us, squeezing so tight."
"That's right, squeeze us," Katsuki panted, his thrusts becoming more erratic, more desperate. "Milk both our cocks, you aching little bunny. Show us how much you love having both your mates inside you. Show us what a desperate breeding slut you are."
Your hips immediately started moving again, seeking more friction, more sensation, more of both of them. They continued their dual thrusts, their cocks sliding past each other inside you, and you could feel them both beginning to lose control, could feel the way they were both getting close.
"She's so perfect," Izuku whimpered, his voice completely wrecked. "So perfect for us, so perfect, losing my mind, can't,"
"Our perfect little bunny," Katsuki agreed, his voice dropping into that cooing tone that made your instincts purr. "So desperate, so needy, so completely ours. You're gonna take our cum, aren't you baby? You're gonna let us fill you up together? Gonna let us breed you like the brainless little slut you are?"
"Yes," you whimpered, "yes, please, want it, crave it."
You were in a state of almost manic euphoria, your cunt pulsing continuously, nearing pain. More arousal flooded around them, making the slide even easier, even more obscene. You could feel it dripping down their shafts, pooling where their bodies met yours, soaking the nest beneath you.
"Kacchan," Izuku was begging now, his voice wrecked and desperate. "I can't, she's gripping us so tight, so wet, I'm losing it,"
"Not yet," Katsuki commanded, though his own voice was thick with arousal and desperation. "She's not done with us yet. Look at her, still clenching, still frantic. Our poor bunny, so hungry for both her mates. Gonna make her cream again before we fill her up."
They continued their relentless pace, their in-tandem thrusts becoming more frantic, more desperate, more violent. You could feel them both beginning to reach their limit, their cocks pulsing inside you, their breathing becoming ragged and desperate. The sensation of them frotting against each other inside you was driving you higher and higher, each thrust building the pressure in your core until you thought you might break.
"Perfect, yes," Katsuki cooed, his hand stroking your hair while his hips snapped against yours with increasing intensity. "Come on, baby. Cum around both our cocks. Show us how much you love being our aching little bunny. Show us what a desperate breeding slut you are."
"So good," Izuku gasped, his voice barely a whisper. "You're so good, taking us both, milking us both, losing my mind, can't,"
"She's perfect," Katsuki panted, his thrusts becoming more erratic. "Our perfect little thing, so desperate, so needy, so completely ours, gonna fill her up, gonna breed her, gonna make sure she knows who she belongs to,"
They were both close now, you could feel it. Their cocks were pulsing inside you, their breathing ragged, their movements becoming less coordinated as desperation took over. The pheromone was affecting them both now, stripping away their control, leaving only instinct and need and the desperate urge to breed.
"Cum," you whimpered, "please, cum inside me, want to feel you both,"
That was all it took. Izuku came first, his entire body going rigid as his cock pulsed inside you, spilling his release in thick, hot spurts. The sensation triggered Katsuki immediately; he slammed deep one final time, grinding against you as his own orgasm hit, his seed flooding into you alongside Izuku's.
The sensation of both of them coming inside you at once was overwhelming, almost too much. You could feel their cocks pulsing in perfect synchronisation, feel the warmth of their releases flooding into you, mixing, filling you impossibly full. You could feel the way they were frotting against each other as they came, their cocks grinding together.
"Oh fuck, oh fuck," Katsuki's voice was completely wrecked, his hips jerking involuntarily as he spilt everything inside you. "So good, so perfect, taking it all, such a good bunny, such a perfect little breeding slut,"
They stayed inside you for a long moment, both of them trembling with the aftershocks of their orgasms. You could feel them both still pulsing slightly, could feel the warmth of their releases inside you, could feel the way they were pressed so close together inside your body.
At some point, you became aware that the desperate edge had faded. The need was still there, but manageable now. Satisfied.
"I think," Your voice was hoarse from screaming, from crying out. "I think I'm okay now."
Katsuki stilled immediately. "Yeah?"
You nodded, suddenly exhausted. "Yeah. The instinct's quiet. I'm okay."
"Twelve rounds," Izuku said weakly. "We went twelve rounds."
"You counted?" Katsuki sounded incredulous.
They pulled out carefully, and you whimpered at the loss. You felt empty, oversensitive, and utterly wrung out. But also peaceful. The fear that had been choking you for the past day was gone.
"C'mere." Katsuki gathered you against his chest, and Izuku pressed close on your other side. "You did so good, bunny. So fucking good."
"We're proud of you," Izuku added softly. "For trusting us. For letting go."
