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The last thing Izuku remembers is falling. The sun had been a glare in his sight, haloing blond hair and a black uniform, a hand reaching out…
When he wakes up it’s cold. He shivers and his teeth chatter and he hissed when warmth stings his face. It smells sweet and familiar.
“Deku… Please open your eyes,” It’s hard to answer the request, but something tells him the warmth that holds his freezing body up is worth the effort.
The room is dim, and his eyes still ache at the sight, but he slowly moves them to the side to look up at the person holding him upright.
“…Kacchan?” He breathes, voice wispy as the expense of his raw throat. A wobbly smile makes its way onto his childhood friends face. His bloody face. “You— You’re hurt,” He croaked, wanting to reach up and press his cold skin against the likely burning skin but the trembling made it hard to lift such a heavy limb.
“It’s okay. It’s okay, it’s all gonna be okay now, Deku.” The warm hand on his cheek caressing the chill from them, Kacchan’s bloodshot eyes welling with tears. His eyes fluttered shut despite himself, still so tired. “Don’t—“
Izuku’s eyes peaked open once more at the choked word. “Don’t… Don’t close your eyes, okay? I just — you’ve been asleep so long, I— I want to talk to you so more.”
“Kacchan… You’re being weird.” Izuku furrowed his brows faintly. “How… How long have I been out? I didn’t think I’d… survive the fall.” He shuddered and Kacchan held him closer, the hand against his side warming up with a subtle push from his quirk.
“You didn’t.” Kacchan whispered and Izuku felt his stomach drop like lead.
“What… do you mean?”
“…I’m sorry, Deku. I’m so sorry.”
“Kacchan? I don’t understand,” Izuku winced at the rise in his voice, rubbing his throat weakly. He could feel the strength returning to himself slowly and was glad for it.
“Don’t hate me. Deku, promise you won’t hate me.” Kacchan smells metallic with blood and it makes Izuku anxious.
“Your wounds—“
“Promise me, you can’t hate me, stupid Deku,” His grip tightens, forcing him to look him in the eye. The blazing red rubies he remembers look like they’ve seen a hundred lifetimes.
“I won’t hate you, Kacchan. I can’t.” Izuku knows Kacchan could never make him hate him. Because Kacchan was a bright light at the end of a tunnel, the burning sun keeping his world warm. He isn’t perfect, but he is the All Might of Izuku’s ordinary home life. He admires him more than anyone he’s ever met.
Even covered in blood, he’s still Kacchan. The loud and proud blond who yells at litterers and leads the way so Izuku won’t get lost.
Kacchan may look different now, but he’s his childhood friend.
“…You died, Deku. You died and I made a deal with the devil to get you back. That’s all that should matter, right? I got you back.” Kacchan’s eyes go distant as he speaks but he still holds Izuku tight.
“Kacchan…” Izuku swallows his dread. “What do you mean ‘a deal with the devil’?”
Kacchan was light and life and strength and…
He looks so tired, so ashamed.
“I helped them kill All Might.”
His breath hitches and Kacchan looks close to tears once more. But instead he smiles and he laughs shakily as he looks down at him. “For you, Deku. His life for yours. It was worth it. I kept you safe…” His thumb wipes away the stray tear that leaks from Izuku’s eye.
“No…” Kacchan was pride and intelligence and leadership and…
The blood on his clothes aren’t his. The only wounds he has are the scraps on his face.
“No — No, you didn’t, Kacchan, don’t—“ Izuku’s tears spilled over as he tried to shake Kacchan’s warmth. “Don’t mess with my head like that, tell me you’re lying—“
“You said you wouldn’t hate me.” Kacchan holds him so tight it makes Izuku’s wince at the pinch of his fingers on sensitive skin.
“Tell me you’re lying. Kacchan. Please.”
“…I’m lying.” The monotone bursts the crack along Izuku’s heart.
“Let go of me,”
“Deku,”
“Let go of me, Kacchan, I can’t — All Might, that’s All Might’s blood — touching me—“ Izuku cries so hard he feels like throw up.
“You promised!” Izuku cries out as his heads yanked to the side to face Kacchan and his hot breath on his face.
His breathing is heavy and ragged but he doesn’t cry, in facts he looks terrifyingly calm.
“You promised you wouldn’t hate me, Deku. You can’t. I saved you.”
“…Why? I was just a quirkless nobody to you. You told me to die. Yet you— you killed—“ He bites back a gag. “For me?”
Kacchan smiles at him. It’s almost sweet, a bitter sadness lingering in his eyes.
“Of course. I was wrong… I need you. I can’t be a hero without you. I can’t — I can’t be anything good without you, Deku.”
“But you were always good, Kacchan. It’s why—“ Izuku bit his lip, closing his eyes so he wouldn’t have to look him in the eye.
“You’re wrong. If I was good, you wouldn’t have died.” Kacchan’s forehead met him gently and Izuku couldn’t calm himself down from his hyperventilating. “But it’s okay now. I saved you. I saved you and I’ll protect you too.” Izuku gasped and choked on his breath as lips met his. He tried to pull away but Kacchan held his face tighter.
“Kac—Kacha—“ He shoved his chest but he barely moved at inch. Teeth sunk into his lower lip and he flinched enough for a tongue push past his lips, Kacchan pulling him in closer by the waist until all Izuku could identify was him.
Izuku continued to squirm, making a noise of protest. He gasped for air as Kacchan pulled back before diving right back in against Izuku’s objection.
“Kacchan — Kacchan, stop—!” He hissed in pain as he was forced onto his back, muscle still aching as he tried to push him away, shuddering with disgust at the feeling of dried blood from Kacchan’s clothes.
“Stop hitting me, Deku,” Kacchan rasped, collecting his wrists into one sweaty hand — Izuku stilled in fear of a blast.
He turned his face away when Kacchan leaned back into another kiss, eyes squeezed shut as he trembled.
“Kacchan — why? I don’t understand…” Izuku’s eyes shot open in shock as a rough palm travelled up his thigh and under his hospital gown, his knees jerking up in retaliation before Kacchan pinned them down with his own.
“It’s okay. I’ve got you. You’re safe, Deku,” Kacchan reassures in a soft voice and Izuku would believe him if not for the hot hand rucking up his gown up until he’s almost bare. He can’t help the tears, or the way his cunt throbbed.
He feels humiliated and scraped raw all at once. He can feel tiny flakes of blood — All Might’s blood — on his thighs and wrists and he wants to hurl.
Yet it’s Kacchan. Once upon a time Kacchan had been Izuku’s first love, his first lust, but now all he can think of is escaping.
“Kacchan… Kacchan please.” Izuku sniffles, chest shuddering with his sobs. He feels a hand against his chest — a soft mound of flesh he doesn’t remember having much of making his entire stomach roil with discomfort.
“Stop— don’t touch my— my chest,” He whimpers, opening his eyes ever so slightly to look at Kacchan who squeezes and pinches at his perky nipples.
“You were always so pretty, Deku… Didn’t care if you were boy, back then,” Izuku can feel his back bow as Kacchan pins his hands above his head, trying to squirm out from under him before teeth dig into the plush flesh of his breast. He cried out, trying to turn his chest away from Kacchan’s mouth only to be held down by the waist.
He whimpered as the hot tongue trailed over his chest, the cold air making them hard and sensitive.
“K-Kacchan… Please, please stop…” Izuku begged but Kacchan only huffed.
“Shut up.”
“Kacchan—“ A fist connected with the mattress and Izuku jumped with fear.
“I sacrificed everything for you! Please, just — just let me have this, Izuku.” It’s a whispered plea. His stomach twists into complicated knots until he finally goes lax in Kacchan’s grip. The blond’s eyes widen, bringing to gaze to his vivid greens. He meets dulled jades.
“…I don’t owe you anything, Kacchan. You’re a villain.” His voice cracks on the final word like the possibility never cross his mind before. Rubies sharpen into something deadly.
“I made the sacrifices necessary. I’m not sorry.” He will be, later, when it all processes, but for now, he has no regrets.
So he sinks his teeth into his singular intact glove and tears it off and spits it aside.
He sinks his teeth into the vulnerable throat of his boy, mars it with love bites that edge on painful, fingers teasing the slick folds of his cute cunt until Izuku is gasping and red faced, pretty green eyes glossy just the way he wants.
All it takes is a guiding hand to get a kiss this time, soaking up the weak moans as he sucks on his tongue.
“Kacchan—“ Two fingers sink into the tight wet warmth of his cunt before he can get anything else out, digging in and curling deep. He bites his lower lip hard to keep his noises quiet, humiliated by his reactions. His mind protests, but his body won’t get with the program, his mind getting fuzzier with every new touch.
“Fuck, look at you,” Kacchan murmurs and Izuku shakes his head. “You’re taking my fingers so well, Deku.” He makes a show of picking up the pace of his fingers, thumb pressing into his clit just to watch the way Izuku jerks into it like he wants it.
He wants Izuku to want it, to crave it. He’ll teach him. With time, all he’ll need is Katsuki. All he needs is Izuku. He knows that now.
He adds another finger and watches the boy writher on them with a moan, his cock throbbing in his pants. He needed to fuck him, now.
“Kacchan, what— what are you do—“ Izuku’s eyes widened in shock as Kacchan shucked his pants down his hips to free himself, stroking his cock with his slick hand. He strained against Kacchan’s hold once more, pulling and tugging until he breaks his grip, but he barely gets out of it before there’s a hand for each wrist pinning them down.
“Don’t fight me, baby. I’m gonna make you feel good,” Kacchan purred in his ear, his head grinding against his clit. He whimpered.
“Kacchan… please. I— I don’t wanna,” He begged in a whisper and Kacchan kissed his tear stained cheek.
“You’ll learn, Deku. I’ll show you everything, baby.” He breathed against his lips, kissing him hard as he made space for himself between Izuku’s legs, dragging his cock along the wet slit to hear Izuku moan against his lips.
“That’s it. Just give in, Deku,” He slid into the tight heat with a groan, licking into Izuku’s mouth as he rolled his hips to grins against him as the boy moans.
“Kacchan,” Izuku breathed, clenched around him like a vice. Kacchan stroked his wrists greatly, sliding his fingers between the boys to hold them.
Izuku looks best with a cock inside him. That Katsuki knows for sure as he snaps his hips forward, pounding into the smaller. Forcing the obscene noises he craves from his lips, watching him cry on his dick, breathing his name like he can’t think of anything else to say.
His face gets so red, freckles blending out, lips pink and swollen.
Izuku can’t form a coherent word as Kacchan forces himself in again and again, making space for himself inside him with his cock. It’s amazing. It’s horrible. It’s Kacchan. It’s Kacchan.
It’s Kacchan and blood and pleasure and darkness and — Izuku can’t escape. He can’t escape any of it, he’s weak and isolated and Kacchan is the only source of familiarity he has left.
‘Just give in.’
Izuku’s stomach pools with liquid heat as he gets closer, wishing he could cover his mouth to silence the perverted sounds.
He’s going to cum on Kacchan’s cock, he’s going to fall apart and he’s not sure in what way anymore.
“Fuck, Deku,” His right hand is free, and he’s seconds from gathering his wits and fighting till the end but then those fingers are on his clit and he throws his head back and grinds against it like it’s the water to put out the fire in his loins.
“Kacchan, Kacchan, Ka— Ah!” He jerks and shudders, back bowed with a choked cry of pleasure as he tips over the edge, shaking with aftershocks as Kacchan continues to fuck him through it.
“Gorgeous, gorgeous Deku, so fuckin’ pretty,” He rasps and Izuku whines at the sensitivity.
He doesn’t get a warning before he feels Kacchan’s hips stutter, hot cum filling his pussy with a whimper.
He shouldn’t have cum inside. Deku wants to tell him so, but he feels so sluggish, exhaustion making his vision blur. He felt Kacchan slip out, dribbles of cum dripping down his ass as he tried to form words.
“You’ve been dead for years, Deku.” Kacchan murmured as he pressed a kiss to his hairline. “You need time to build up strength again. It’s okay, I’ll help you…”
Izuku wanted to say no. Say that he didn’t need his help.
“Sleep, Deku. I’ll watch over you.”
“Ka…chan…” His eyelids drooped as he drifted off against his will. Kacchan brushed fluffy green hair out of his face with a soft smile.
“My Deku…” Kacchan whispered reverently. “You’ll help me atone for it all. And I’ll protect you. I won’t let you leave again.” He promised to the unconscious boy, adjusting his gown and laying him down. He looked down at his own blood sodden clothes blankly. He cracked his knuckles and watched at orange sparks crackled.
“…I’ll master One For All and kill All For One. Then it can be just us two. Just hang in there, Deku.”
Now to burn his clothes.
Then he will burn the underworld to nothing and find somewhere nice for Deku and him to live. Somewhere with lots of outdoor space.
After all, he had to keep Deku with him no matter what.
Deku won’t leave a child.