Chapter 21: Public Claim
The silence in the debriefing room had been a solid, palpable thing. Aizawa had watched them, his dark eyes missing nothing—the fresh bruises peeking above Izuku’s collar, the way Katsuki sat angled protectively between Izuku and the door, the deliberate flatness in their voices as they recited the approved story: trigger activated, psychological effects neutralized, no lasting physical compromise. The medical staff took notes, their glances flickering between the two heroes with poorly concealed curiosity. They asked about heart rate spikes, adrenal feedback, subjective emotional distress. They did not ask about bite marks.
Aizawa dismissed them with a final, weary warning. “Get some real rest. That’s an order. Your systems have been through a chemical wringer. No patrols for forty-eight hours.”
They walked out of the medical wing side by side, the institutional lights humming overhead. The normality of the agency’s corridors felt like a separate dimension. Passing sidekicks offered nods, a few muttered “Glad you’re okay”s. Every glance felt like an assessment. Katsuki’s jaw ached from clenching.
The locker room was their destination, a sanctuary of sorts. Their real clothes were there, their gear, the familiar scent of metal and old sweat. Katsuki pushed the door open, and the heavier, earthier air of the locker room enveloped them, a relief after the sterility of the med bay.
It was empty. For a moment, there was just the echo of their footsteps on the concrete floor, the drip of a distant shower, the soft buzz of the fluorescents. They made their way to their respective lockers, a few apart along the same wall. The routine of spinning the combination, pulling the metal door open, was grounding. Katsuki shucked off the grey agency sweats, balling them up and shoving them into the bottom of his locker with a grunt of finality. He reached for his own clothes—black denim, a tight grey shirt.
He was pulling the shirt over his head when he heard the door open again, followed by two sets of footsteps that were far too purposeful to be random.
“There you two are!”
Kirishima’s voice was its usual boisterous self, but there was an edge underneath it, a forced casualness. Katsuki finished yanking his shirt down and turned, already scowling.
Kirishima and Uraraka stood just inside the doorway, blocking the exit. Kirishima had his arms crossed, his red hair spiked defiantly. Uraraka hovered beside him, her expression unreadable, her eyes sharp and focused. They looked like a fucking intervention.
Izuku, halfway into a fresh pair of pants, froze. His head popped up over the locker door, his face pale.
“We heard you got hit with something nasty in quarantine,” Kirishima said, walking forward, his heavy boots clomping. “Some kind of mental trigger. That’s rough, guys.”
“We’re fine,” Katsuki bit out, turning back to his locker as if that would end the conversation.
“Are you?” Uraraka asked. Her voice was quiet, but it carried in the cavernous room. She took a few steps closer, her gaze shifting from Katsuki’s rigid back to Izuku’s anxious face. “Because you both look… frazzled. More than usual. And the medical staff is whispering.”
“Let them whisper,” Katsuki snarled, slamming his locker shut with a bang that echoed.
“It’s not just that,” Kirishima pressed, undeterred. He leaned against the next locker over, facing them. “It’s been going on for weeks, man. The tension. The weird secret meetings. The way you two are either trying to murder each other in the gym or you’re avoiding each other completely. And now this? With the seed thing?” He rubbed the back of his neck. “Look, we’re your friends. We’re worried. This weird… thing between you is starting to affect your work. I saw the security feed from the gym last week. That wasn’t a spar, Bakugou. That looked like you were trying to exorcise something.”
Izuku flushed, looking down at his feet. “It’s… it’s complicated, Kiri.”
“Complicated how?” Uraraka asked gently, but there was a relentless core to her question. “Deku, you can talk to me. You’ve been distant. Jumpy. You flinch when he enters a room, but you also track him across it like a missile. What’s happening?”
The air grew thick. Katsuki could feel the pressure building in his sternum, a familiar combustion waiting for a spark. They were poking at a raw, newly rewired nerve, and every word was a needle.
“It’s none of your damn business,” Katsuki said, his voice low and dangerous.
“It becomes our business when our friends are hurting,” Uraraka shot back, her own temper flashing. “When you come out of a quarantine looking like you’ve been through a war and acting like you’re about to start another one!”
“You don’t know what the hell you’re talking about, Round Face!”
“Then explain it!” Kirishima pushed off the locker, his voice rising. “Because from where we’re standing, it looks like whatever this is, it’s eating you both alive! Is it a rivalry thing? A power struggle? What?”
Izuku made a small, strained noise. “Please, guys, just drop it—”
Katsuki saw it then—the look on Izuku’s face. Not just embarrassment, but a deep, shameful fear. The fear of being exposed, of having this fragile, violent, precious thing they’d just clawed back from the brink being dissected by friendly eyes. The seed’s poison whispered again: See? They’ll make it a pity case. They’ll ruin it.
Something in Katsuki snapped.
Not explosively, but with a terrifying, cold precision. He turned from his locker and took two long strides across the space between them. Izuku looked up, his green eyes wide with confusion and alarm. “Kacchan—?”
Katsuki didn’t answer with words. He shoved Izuku backwards, not hard enough to hurt, but with enough force to pin him squarely against the cold metal of the lockers with a resonant clang. Izuku’s breath hitched, his hands coming up instinctively to brace against Katsuki’s chest.
Before Izuku could utter another sound, before Kirishima or Uraraka could process the movement, Katsuki closed the final distance. He cupped the back of Izuku’s neck, fingers tangling in the green curls, and crushed their mouths together.
It was not a gentle kiss. It was a declaration. A branding. Possessive and raw, all teeth and desperate pressure, a perfect echo and answer to the chaos of the medical bay. Izuku stiffened for a split second, a muffled sound of shock escaping him against Katsuki’s lips. Then, with a shudder that went through his whole body, he melted. His hands, which had been braced to push, clenched instead into fistfuls of Katsuki’s shirt, pulling him closer, anchoring himself as he kissed back with equal fervor.
The locker room fell utterly silent except for the soft, wet sound of the kiss and Izuku’s ragged, shaky breath through his nose.
Katsuki broke the kiss as abruptly as he’d initiated it, pulling back just enough to glare over his shoulder at their frozen, wide-eyed friends. His own breath was coming fast, his chest heaving against Izuku’s. He kept one hand firmly planted on the locker by Izuku’s head, caging him in.
“Happy now?” he growled, the words dripping with defiant challenge.
Izuku, flushed a spectacular crimson from his hairline to the collar of his shirt, was staring up at him, dazed and breathless, his lips swollen. His fingers were still twisted tightly in the fabric of Katsuki’s shirt, as if he’d fall without the grip.
His fingers were still twisted tightly in the fabric of Katsuki’s shirt, as if he’d fall without the grip.
Kirishima’s jaw was practically on the concrete floor. He blinked, once, twice, as if clearing a hallucination. Uraraka’s hands had flown to her mouth, her eyes wider than Katsuki had ever seen them.
A full five seconds of dead air hung in the room, thick with the smell of old sweat and metal and this new, shocking truth.
“Wait,” Kirishima finally choked out, his voice an octave higher than normal. He pointed a wavering finger between them. “Are you guys? Dating? Officially?”
Izuku flushes red at that question, a fresh wave of heat crawling up his neck. He tried to shrink back into the lockers, but Katsuki’s arm was still caging him in. His grip on Katsuki’s shirt tightened.
Katsuki just clicks his tongue, a sharp, dismissive sound. He finally stepped back, letting his arm drop, and Izuku swayed slightly without the support. “It’s complicated,” Katsuki muttered, shoving his hands into his pockets. He wouldn’t look at any of them, his gaze fixed on a scuff mark on the floor. “Somewhere… in between.”
The admission, grunted and reluctant, seemed to suck all the confrontation out of the room. It was replaced by a stunned, delicate silence.
“In between,” Uraraka repeated softly, her hands lowering. Her gaze softened from shock to something more analytical, darting between Izuku’s embarrassed, hopeful face and Katsuki’s defensive posture. A slow understanding dawned there.
Kirishima ran a hand through his spiked hair, letting out a long, low whistle. “Dude. Okay. That… explains a lot. The gym. The weird energy. The, uh…” He gestured vaguely at Izuku’s throat.
Katsuki’s head snapped up, his red eyes blazing. He took a threatening step toward his friend. “But I swear to god, Shitty Hair, Round Face, you guys tell anyone I’ll kill you both.” The threat was flat, absolute, and completely sincere. “This isn’t gossip. This isn’t agency bulletin board crap. You breathe a word—”
“We won’t,” Uraraka cut in, her voice firm. She looked at Izuku, a gentle question in her eyes. “Right, Deku?”
Izuku finally found his voice, though it was small. “Please. It’s… it’s new. And it’s fragile. And with everything that happened with the seed…” He trailed off, the memory of the false balcony, the psychological violation, passing visibly behind his eyes. “We’re just figuring it out.”
Kirishima’s usual boisterousness was gone, replaced by a solid, earnest seriousness. He met Katsuki’s glare without flinching. “Your secret’s safe with us, man. You have my word.” He offered a sharp-toothed grin. “Though, you gotta admit, this is way healthier than actually trying to murder each other.”
“Debatable,” Katsuki grumbled, but some of the lethal tension left his shoulders.
The fluorescent light buzzed overhead. The moment stretched, awkward and heavy with things still unsaid. Katsuki couldn’t stand the scrutiny anymore, the way Uraraka was looking at Izuku like she wanted to hug him and grill him for details simultaneously.
“We’re leaving,” Katsuki announced, grabbing his gym bag from his locker. He didn’t look at Izuku, just jerked his head toward the door. “Now.”
Izuku nodded, scrambling to collect his own things. He offered Kirishima and Uraraka a last, apologetic, and incredibly flustered smile before following Katsuki’s retreating back.
The heavy locker room door swung shut behind them, leaving Kirishima and Uraraka alone in the sudden quiet.
Kirishima let out another long breath. “Well. That happened.”
Uraraka was still staring at the door, her expression thoughtful. “He said ‘in between’.” She looked at Kirishima. “After a kiss like that? What’s ‘in between’?”
“For them?” Kirishima said, shaking his head with a faint, fond smile. “Probably everything. It’s Bakugou. He’d rather chew glass than use the word ‘boyfriend’.”
Outside in the corridor, the sterile lights felt exposing. Katsuki walked fast, his boots echoing, putting distance between them and the locker room, between them and the witnesses. Izuku hurried to keep up, his mind a whirlwind of panic and a strange, giddy relief.
“Kacchan, wait.”
“What?”
“You… you told them.”
Katsuki stopped abruptly, turning on his heel. Izuku nearly collided with him. “I showed them,” he corrected, his voice low. “There’s a difference. They were poking, and I ended it. Simple.”
It wasn’t simple. Izuku could see the barely-contained storm in his eyes—the vulnerability of the confession, the terror of exposure, the residual anger from the seed’s violation all churning together. He’d just declared a precarious truth to two of the most important people in their lives, and it had clearly stripped a layer of armor off him.
“Thank you,” Izuku said softly.
Katsuki blinked, thrown. “For what?”
“For ending it.” Izuku’s smile was small, but genuine. “For making it real for them, so I didn’t have to try and explain something I don’t even understand.” He glanced down the empty hall, then back at Katsuki. “They’ll keep our secret.”
“They better,” Katsuki muttered, but he wasn’t arguing. He just stood there, looking at Izuku as if he was a complicated mission parameter he couldn’t quite solve.
The “in between” hung in the air, a vast and uncharted territory they were now stumbling through together, with two more people knowing they were lost in it. Katsuki turned and started walking again, a little slower this time.
Izuku fell into step beside him, their shoulders almost touching.
Izuku fell into step beside him, their shoulders almost touching. The silence wasn’t empty now; it was charged with the aftershock of the kiss, the blunt revelation, the unspoken agreement that they were walking into something new. The agency’s fluorescent lights painted everything in a harsh, revealing glare, but neither of them moved apart.
They didn’t go to Izuku’s apartment. They went to Katsuki’s. It became an unspoken rule in the days that followed. Izuku would let himself in with the key Katsuki had shoved into his hand without a word, the metal still warm from his pocket. If his own place felt too quiet, too full of static after the seed’s violation, Katsuki would appear at his door, a scowl on his face and a bag of groceries in his hand, muttering about the pathetic state of Izuku’s fridge.
The frantic, desperate energy from the quarantine room began to metabolize into something else.
Katsuki found himself having more peaceful moments. Moments not so full of aggressive lust. He’d come home from a long, grating day of paperwork and public appearances, his temples throbbing, to find Izuku already on his couch, notes spread out for a case. Izuku would look up, a soft “Hey, Kacchan” forming on his lips. Instead of a snarl, Katsuki would just walk over and lean on him, his forehead coming to rest heavily on top of Izuku’s head with a long, bone-deep sigh. He’d stand there, eyes closed, breathing in the scent of Izuku’s shampoo and the fading ozone of his own quirk, letting the solid, familiar warmth beneath him absorb the day’s tensions.
When they watched a show together, Katsuki would yank Izuku backwards by the shoulder until he was sprawled half on top of him, legs tangled. He’d wrap an arm around Izuku’s chest, his hand splayed possessively over his sternum, feeling the steady beat of his heart through his shirt. It was just cuddling. Simple, quiet contact that demanded nothing but presence.
If Izuku was standing at the kitchen counter, chopping vegetables or staring blankly at the rain on the window, Katsuki would come up behind him. He didn’t announce himself. He’d just slide his arms around Izuku’s waist, lock his hands together over his stomach, and bury his face into the junction of Izuku’s neck and shoulder. He’d breathe there, sometimes for a full minute, while Izuku would go perfectly still, then melt back against him, a soft hum of contentment in his throat.
Of course they still had their sex. A lot. The physical need was a constant, low-grade current between them, and it often sparked into a blaze.
But the kisses felt different. Less aggressive. They felt deeper. Katsuki would catch Izuku’s mouth in a slow, searching kiss that lingered, that tasted rather than claimed. It was still hungry, a primal pull neither could deny, but there was something softer behind it now. A question, maybe, instead of just a demand.
It was after one of those soft, deep kisses, late on a Thursday night with the city lights painting Katsuki’s bedroom in faint amber and blue, that the current surged. They were on the bed, side by side, and Katsuki had been lazily mapping the freckles on Izuku’s shoulder with his tongue. The kiss had started as a natural progression, a slow fuse.
It changed when Izuku rolled on top of him, straddling his hips, and looked down with an expression of fierce, quiet intent. “I want you,” he said, his voice husky. “I want to feel all of you. Right now.”
The raw need in his tone, so direct, banished all softness. Katsuki’s eyes darkened. “Then take it,” he growled, his hands going to Izuku’s hips, fingers digging in. “Don’t just sit there looking pretty.”
Izuku didn’t need more encouragement. He reached for the lube on the nightstand, his movements efficient. He coated Katsuki’s cock with a slick, practiced stroke that made Katsuki hiss, his abdomen tightening. Then Izuku rose up on his knees, positioned himself, and sank down in one slow, excruciatingly deliberate motion.
He took every inch, his head falling back as he sheathed Katsuki completely inside himself, a guttural “Fuck” tearing from his lips. He was so tight, so hot, clenching around him like a vise. Katsuki could only watch, mesmerized, as Izuku began to move.
He set a relentless, rolling rhythm, riding him with a focused intensity that was entirely his own. His hands were braced on Katsuki’s chest, his own cock hard and leaking against his stomach. The slick, wet sounds of their joining filled the room, a filthy counterpoint to their ragged breathing.
“You feel so deep like this,” Izuku panted, his green eyes glazed, watching where their bodies connected. “I can feel you… all the way inside. God, Kacchan.”
Katsuki thrust up to meet him, driving harder, changing the angle. The headboard slammed against the wall with a rhythmic thud. “Yeah? You like that? Taking my cock like you fucking need it?”
“I do,” Izuku moaned, his composure shattering. “I need it, I always need it, please—” His words dissolved into a cry as Katsuki sat up halfway, wrapping one arm around Izuku’s back to hold him close and using the new leverage to pound up into him with brutal, upward drives.
The kiss they shared then was a messy clash of teeth and tongue, all salt and shared breath. Katsuki’s other hand slid between them, fisting Izuku’s cock, stroking him in time with his thrusts. The coordination was instinctive, perfect.
“I’m gonna come,” Izuku warned, his voice breaking, his whole body trembling like a plucked wire.
“Do it,” Katsuki snarled into his mouth. “Come all over my hand. Let me feel you clench around me.”
The command tipped Izuku over. He came with a choked-off shout, his release hot and pulsing over Katsuki’s fingers, his internal muscles spasming around Katsuki’s cock in rapid, irresistible flutters. The sensation ripped Katsuki’s own orgasm from him, a wave of blinding heat that crested and crashed, flooding into Izuku as he held him impossibly close, his own shout muffled against Izuku’s sweat-damp skin.
They collapsed together, a tangled, sticky mess. Katsuki’s heart hammered against Izuku’s, their breathing slowly synchronizing in the dark. The city’s hum filtered through the window.
Izuku’s fingers traced idle patterns on Katsuki’s scalp. “Kirishima texted me today,” he murmured, his voice drowsy. “Asked if we wanted to get barbeque this weekend. As a double date. With Uraraka.”
Katsuki went still beneath him. “A double date.”
“That’s what he called it.”
The word ‘date’ hung in the air, foreign and heavy. It wasn’t a label they’d used. It was a threshold. Katsuki stared at the ceiling, feeling the comfortable weight of Izuku on his chest, the ghost of the seed’s poison safely locked away, the new, terrifying vulnerability of being known.
He let out a long, slow breath. “Tell the shitty-haired bastard Saturday. And he’s paying.”
Izuku’s smile was a warm pressure against his collarbone. The peace held, fragile and real, a quiet space between the violence of their past and the unknown shape of what came next.