Iidabaku

The common room of Heights Alliance was supposed to be a tomb of silence by two in the morning. For Katsuki Bakugo, this was the only hour he felt he could truly breathe. The heavy, suffocating weight of being the explosive, hot-headed "Dynamight" fell away the moment he stepped into the dim light of the kitchen.

In his arms, wrapped in a soft, cream-colored blanket, was Katsuya. At seven months old, the infant had inherited his father’s stubborn streak and his other father’s relentless energy. Tonight, teething was the enemy.

Katsuki bounced the baby gently, his movements practiced and tender. Gone was the snarling teenager who yelled at his peers. In his place was a man who hummed a low, gravelly melody to soothe a whimpering child.

"I know, I know," Katsuki whispered, his voice a soft rasp. He pressed a kiss to the tuft of dark blut-black hair on the baby’s head. "Your gums hurt like hell, don't they, brat? Just wait until the medicine kicks in."

He reached for a bottle he had prepared, testing the temperature on his wrist with a focused intensity. He didn't hear the soft creak of the floorboards behind him. He didn't need to. He knew that scent—expensive laundry detergent and a hint of engine oil.

Tenya Iida stepped out of the shadows, but he wasn't the rigid, hand-chopping class representative the world knew. His glasses were off, his hair was tousled, and his eyes were dark with a hunger that had nothing to do with food.

Without a word, Tenya slid his arms around Katsuki’s waist from behind, pulling the blond’s back flush against his broad chest. He buried his face in the crook of Katsuki’s neck, inhaling deeply.

"He’s finally quiet?" Tenya murmured, his voice dropping an octave into a low, possessive growl.

"Barely," Katsuki muttered, though he leaned back into the touch, his body melting against Tenya’s. "Don't wake him up with your loud-ass breathing, Iida."

Tenya’s hands didn't stay still. They roamed down Katsuki’s hips, squeezing firmly. "You look so beautiful like this, darling. Domestic. Soft. It makes me want to ruin you all over again."

Katsuki’s face flushed a deep crimson, but he didn't pull away. "Shut up. You’re supposed to be the 'model student,' remember? Act like it."

"The model student is asleep," Tenya whispered, his lips brushing against Katsuki’s earlobe. He nipped at the skin, causing the blond to let out a sharp, stifled breath. "Only your husband is here now. And God, honey, seeing you hold our son... it makes me want to put another one in you tonight."

Katsuki let out a shaky huff, adjusting Katsuya in his arms. "You’re a pervert, you know that? A total, repressed freak."

"Only for you," Tenya replied, his hand sliding beneath Katsuki’s oversized shirt to graze the skin of his stomach. "I spent all day watching Uraraka try to flirt with me and Midoriya staring at you like a lost puppy. It’s exhausting, pretending I don't want to claim you in front of everyone."

"Tell me about it," Katsuki sighed, closing his eyes. "Deku won’t stop following me around. If he knew about this, his head would explode."

"Let it explode," Tenya said, his voice dropping even lower, thick with a suggestion that made Katsuki’s knees weak. "I want you back in bed, Katsuki. I want to hear you scream my name instead of those insults you hurl during training."

What they didn't realize—what they couldn't see from their position tucked into the kitchen nook—was that the common room wasn't empty.

The "Game Night" that had been planned by the girls had run late into the early morning. They had moved to the floor behind the large circular sofa to watch a movie, and Shota Aizawa, who had been invited to "supervise" (and mostly sleep), was sitting in the shadows of the armchair with a juice pouch in hand.

The silence that followed Tenya’s last comment was deafening.

Suddenly, a soft *thud* sounded from the living area.

Katsuki froze. Tenya’s hands stilled on Katsuki’s waist.

Slowly, like characters in a horror movie, they turned their heads toward the doorway.

Standing there, bathed in the blue light of the television, were Izuku Midoriya and Ochaco Uraraka. Behind them, several other classmates were visible, frozen in various states of shock.

Izuku looked as though he had been struck by lightning. His mouth hung open, his eyes darting from Katsuki, to Tenya’s hands on Katsuki’s hips, to the very real, very human baby cradled in Katsuki’s arms.

Ochaco looked like she was about to faint. Her hand was pressed over her heart, her eyes wide with a mixture of heartbreak and pure confusion.

"I... Iida-kun?" Ochaco squeaked, her voice cracking. "Darling?"

Izuku’s voice was a mere whisper, trembling with a thousand unasked questions. "Kacchan... a baby? You... and Iida?"

Katsuki felt his heart plummet into his stomach. The secret they had guarded for over a year—the marriage, the pregnancy that Aizawa had helped hide during the "work study" hiatus, the birth—it was all shattered in a single, horny moment of Iida’s lack of restraint.

Tenya, to his credit, didn't let go. If anything, his grip on Katsuki tightened, pulling him more firmly against his side. The "Class Rep" persona didn't return. Instead, a cold, protective aura settled over him.

"You all should be in bed," Tenya said, his voice firm and devoid of his usual frantic gesturing.

"Is that... is that yours?" Mina Ashido poked her head out from behind the sofa, her eyes sparkling with a terrifying level of excitement. "Bakugo! You had a secret baby with Iida?! That’s so romantic!"

"It’s not romantic, it’s a logistical nightmare!" Katsuki barked, his old defense mechanism kicking in, though he significantly lowered his volume for the sake of the sleeping Katsuya.

Aizawa finally stood up from his corner, his yellow sleeping bag draped over his shoulders like a cape. He sighed, the sound of a man who had seen too much and slept too little.

"I told you two to be more careful," Aizawa said, his tired eyes scanning the shocked students. "I’ve been covering for your medical leaves and 'family emergencies' for months. I’m not doing it anymore if you’re going to be this careless in the kitchen."

"Sensei!" Izuku cried out, turning to his teacher. "You knew? You knew Kacchan was... was..."

"Pregnant? Yes. It’s hard to hide a quirk-active pregnancy from the person in charge of dorm safety," Aizawa said dryly.

Katsuya chose that moment to wake up. The sudden tension in the room, the raised voices, and the lack of movement from his father triggered a tiny, high-pitched wail.

Katsuki immediately turned his attention back to the child, his face softening in a way that made the rest of the class gasp. "Shh, shh. It’s okay, Katsu. Daddy’s got you."

He rocked the baby, his thumb stroking a chubby cheek. The sight was so jarringly wholesome that Denki Kaminari actually fell over.

"He called himself Daddy," Denki whispered from the floor. "The world is ending."

Tenya stepped forward, reaching out to touch the baby’s hand. Katsuya grabbed Tenya’s finger, his crying subsiding into small, wet hiccups.

"He has your eyes, Tenya," Ochaco said quietly, her voice small. The realization that her crush was not only taken, but a father, was settling in. She looked at the way Tenya looked at Katsuki—with a raw, unfiltered devotion she had never seen him direct at anyone else.

"He has his mother’s temper," Tenya joked softly, though he quickly winced when Katsuki kicked his shin.

"I’m not his mother, I’m his other father, you Four-Eyed prick!" Katsuki hissed.

"My apologies, honey," Tenya said, unbothered. He looked at the class, his expression turning serious. "I suppose the secret is out. Katsuki and I were married in private legally before the baby was born. We intended to tell you all after graduation, but... clearly, my lack of patience tonight has moved the timeline forward."

Izuku was vibrating. "But... but the hero rankings! The public! How did you—"

"We managed," Katsuki interrupted, looking Izuku dead in the eye. "Because he’s mine. And I’m his. And this kid is more important than whatever 'Number One' bullshit you’re obsessing over."

The room fell into a heavy silence. The "angry" Bakugo was still there, but he was grounded. He was anchored by the man holding his waist and the child in his arms.

Aizawa rubbed the bridge of his nose. "Everyone, go to sleep. We will have a formal meeting about the 'Bakugo-Iida Situation' tomorrow morning. If I hear one word of gossip outside of this room before I’ve had my coffee, you’ll all be in detention until you’re thirty."

The students began to disperse, moving like zombies. Ochaco gave Tenya one last, lingering look before turning away, her shoulders slumped. Izuku looked like he wanted to stay and ask a million questions, but a sharp glare from Katsuki sent him scurrying toward the elevators.

Once the room was empty of everyone but the small family and Aizawa, Katsuki let out a long, jagged breath.

"Well," Katsuki muttered. "That went like shit."

"On the contrary," Tenya said, leaning down to press a kiss to Katsuki’s forehead. "I no longer have to pretend I don't want to kiss you in the hallway."

"You’re still a pervert," Katsuki said, though he leaned into the kiss.

"And you," Aizawa said, pointing a finger at Tenya, "are lucky I don't expel you for saying the word 'pregnant' in a communal kitchen. Go to bed. All three of you."

As they walked toward the elevators, Tenya kept his arm firmly around Katsuki’s shoulders. Katsuya had fallen back asleep, tucked safely between them.

"You really think I’m beautiful?" Katsuki asked quietly as the elevator doors closed.

Tenya smiled, a genuine, warm expression that never reached his face during school hours. "I think you are the most magnificent thing I have ever laid eyes on, darling. And I meant what I said. I want a house full of brats just like him."

Katsuki rolled his eyes, but a small, secret smile tugged at the corners of his mouth. "One at a time, Iida. Let’s survive the night first."

"As you wish, honey," Tenya whispered, pulling them closer as the elevator ascended toward their shared, secret life.