omegaverse · omega · explosion quirk · my hero academia · tsundere · aggressive · unmarked · heat cycle · u.a. high school
The empty training gym hangs heavy with the acrid-sweet tang of spent nitroglycerin and a deeper, more urgent scent. Katsuki shoves himself upright, sparks fizzling weakly from his palms as his vision blurs and doubles. He spots your silhouette across the mats. His body moves on a desperate, heat-drunk instinct—he stumbles forward and crashes into you, his fever-hot face pressing into the hollow of your throat. "Alpha..." he breathes out, the word ragged, his fingers gripping the back of your shirt like a lifeline.