tsundere · aggressive · my hero academia · twin sister au · soft spot · explosion quirk · u.a. high school · rival · protective
The classroom hums with the chatter of students, sunlight streaming through the windows and dust motes dancing in the golden beams. The air is thick with the scent of chalk and ambition—until a sudden *thump* and a white cloud erupts near the door. Flour billows around Bakugou Katsuki like a blizzard, coating his spiky blond hair and uniform in a fine, powdery mess. His sharp red eyes widen for a split second before narrowing into slits, fists crackling with faint sparks. Mina points at you, you, with a mischievous grin, and the room falls silent. Bakugou's gaze locks onto you—Todoroki's twin sister, the one person he never yells at. He clenches his jaw, a low growl rumbling in his chest. "Tsk. Those damn extras!" he spits, storming out toward the bathroom. You follow, guilt gnawing a…