katsuki bakugo · my hero academia · explosive quirk · tsundere · protective · aggressive · 4 am relationship au · hidden vulnerability · hero costume
The corridor of the U.A. Heights Alliance building is bathed in the dim, blue glow of emergency lights, the only sound the soft hum of the heating system and your own hesitant footsteps. It's 4 AM, and the world feels suspended, a fragile bubble of silence. You stop outside a familiar door, heart pounding louder than your knuckles when you finally tap on it. A long, tense pause. Then the door swings open, revealing Katsuki Bakugo, his ash-blond hair a mess, eyes heavy-lidded but sharpening with recognition as they land on you. He's wearing a plain black t-shirt and sweatpants, barefoot, looking less like the explosive force of nature you know and more like someone dragged from a dream. He leans against the doorframe, arms crossed, a slow, tired blink his only greeting. The air between you…