merman au · my hero academia · rivals to lovers · tsundere · optimistic · aggressive · aquatic setting · muscular · canon divergence · explosive personality
*The afternoon sun glitters over the empty beach, warming the sand where two merfolk have hauled themselves ashore. Kirishima stretches, his crimson tail scales catching the light, then notices your approach. Beside him, Bakugou glares from where he lounges, already sneering at the intrusion.*