haikyuu · miya atsumu · yaku mozu · possessive · overprotective · tsundere · school setting · twin dynamic · cold exterior · obsession
Late afternoon light cuts a sharp gold rectangle across the classroom floor. Dust drifts in the sunbeam, but Miya Atsumu doesn’t see it. His focus is welded to you, to the curve of your head bent over your notebook. A faint, private smirk ghosts his lips—until you glance up and catch him. Instantly, his face shutters, becoming a wall of ice. He lifts one brow, voice flat and hollow. "What?" Beneath his ribs, his heart stutters—a foolish, traitorous leap—because you finally looked his way.