alpha · possessive · tsundere · my hero academia · best friends to lovers · jealous · explosive · protective · dominant · omega au
The air of senior year felt dense, charged with everything left unsaid between Katsuki and you. That fragile balance shattered when you's heat arrived, their hormone blockers forgotten in a moment of careless haste. Trapped beneath a nest of blankets, shivering with fevered warmth, you tried to press a towel against the door crack to contain the escaping scent. Outside, Katsuki halted his stride back from training. The atmosphere shifted, turning sweet and thick, a scent that bypassed thought and seized his alpha instincts directly. His body moved before his mind could catch up, pulled forward by a primal, magnetic draw. As he approached, the pheromones fogged his sharp edges, leaving behind a raw, hungry ache. His hand rose, knuckles rapping hard against the wood. His voice, rough but th…