Y/N inserts (male and female)

Fanning the Flames

Bakugou

The common room of UA's Class 1-A dormitory was tense. The air crackled with the energy of heated words exchanged between Katsuki Bakugou and his classmates. His usual scowl was deeper, his crimson eyes blazing with unrestrained fury. Words flew back and forth—something about teamwork, a mission gone awry, and blame being tossed like a live grenade.

Standing by the doorway, Y/N watched, his golden dragon-like eyes narrowing slightly. His chest felt tight, not because of anger, but concern. He knew Katsuki well enough to recognize when he was on the edge. His boyfriend had a temper that could rival an erupting volcano, and right now, it was ready to blow.

"Bakugou, enough!" Kirishima shouted, his shark-toothed grin nowhere to be seen. "We're not trying to gang up on you! We're your friends!"

"I don't need your damn friendship lessons!" Katsuki snarled, his hands sparking with tiny explosions. The popping sounds echoed like miniature fireworks, sending a few classmates instinctively backing away.

That's when Y/N decided to intervene. He stepped forward, his presence commanding in a quiet way. The tall figure of the dragon-quirked boy was hard to ignore, especially with his shimmering scales peeking out from his forearms and neck—a physical manifestation of his quirk. His voice, however, was calm and steady.

"Katsuki," Y/N said, his voice low but firm. "Take a deep breath. You're going to hurt someone if you don't cool down."

Bakugou turned, his fiery gaze locking onto Y/N. For a moment, his expression softened—just a flicker of recognition amidst the storm. But the next instant, his pride flared again. "Don't tell me to calm down, Y/N! I've got this under control!"

Y/N sighed, stepping closer. He had been in this position before, and while Katsuki was stubborn, he trusted Y/N more than anyone else. Or at least, he usually did.

"You're not thinking straight," Y/N continued, his voice quieter now. "I know you're angry, but you're lashing out at people who care about you. Look at Kirishima—he's just trying to help."

"I don't need help!" Katsuki barked, his voice a thunderclap. His right hand flared again, and before he could fully register what happened, a stray explosion erupted from his palm. The fiery blast struck Y/N squarely on his left arm, the heat searing through the thin fabric of his shirt and licking against his scaled skin.

The room went silent. Katsuki froze, his fiery bravado extinguished in an instant. The other classmates stared, eyes wide with shock. Y/N staggered slightly, clutching his arm as smoke rose from the burn.

"Y/N!" Katsuki's voice cracked, the anger draining from it completely. He lunged forward, his hands trembling as he reached for Y/N but hesitated, afraid of causing more harm. "Shit, I—! I didn't mean to—! Are you okay?"

Y/N winced but managed a small smile. "I'm fine," he said, though his voice was strained. His dragon quirk provided some resilience to heat, but even scales couldn't protect him completely from an explosion that close.

"You're not fine!" Katsuki snapped, though it wasn't his usual sharp tone—it was panic. Guilt twisted his features as he grabbed Y/N's uninjured arm, his grip desperate. "Why the hell did you get so close? I could've— Damn it, why didn't I—?!"

"Katsuki." Y/N's voice cut through his spiral. He placed a hand on Katsuki's shoulder, the touch grounding despite the pain radiating through his burned arm. "It's okay. I know you didn't mean to."

"But I still—" Katsuki swallowed hard, his jaw clenching. He turned toward the rest of the class. "Get Recovery Girl! Now!"

Midoriya and Iida scrambled to comply, rushing out the door, while the others hovered awkwardly, unsure if they should stay or give the couple space. Eventually, they decided on the latter, leaving Katsuki and Y/N alone in the room.

"I'm so damn stupid," Katsuki muttered, his voice barely above a whisper. He guided Y/N to sit on the couch, kneeling in front of him. His hands hovered over Y/N's burned arm, hesitant. "I could've really hurt you. What if I—?"

"Stop," Y/N interrupted, his voice soft but firm. He tilted Katsuki's chin up, forcing him to meet his eyes. "You didn't mean to. That's all that matters. I know you, Katsuki. You're not careless, and you're not cruel. It was an accident."

"But I still let it happen," Katsuki said, his voice breaking. "I always screw up with the people I care about most."

Y/N's heart ached at the vulnerability in Katsuki's eyes. He leaned forward, pressing his forehead gently against Katsuki's. "You're not perfect, Katsuki. Neither am I. But we get through it together. That's what matters."

For a moment, they stayed like that, the warmth of the moment far gentler than the explosive heat of earlier. Recovery Girl arrived soon after, treating Y/N's burn with her usual no-nonsense attitude. Katsuki hovered the entire time, muttering apologies and promises to do better.

Later that night, after everyone had gone to bed, Y/N found himself curled up with Katsuki in his dorm room. The blond refused to let go of him, his arms wrapped tightly around Y/N's waist as if he were afraid he might vanish.

"Next time, just smack me or something," Katsuki mumbled against Y/N's chest, his voice laced with exhaustion. "Don't get so close when I'm being a damn idiot."

Y/N chuckled softly, running his fingers through Katsuki's spiky hair. "Deal. But only if you promise to listen when I tell you to calm down."

Katsuki snorted but didn't argue. "Yeah, yeah. I promise."

As they drifted off to sleep, Y/N couldn't help but think that even the most explosive storms could be tamed—with patience, understanding, and love.