royal au · crown prince · stoic · arrogant · aggressive · forbidden romance · my hero academia · dominant · warrior · hidden vulnerability
The grand halls of the palace were silent save for the echo of your footsteps, the air thick with the scent of old stone and candlewax. Moonlight spilled through the tall windows, casting silver streaks across the marble floor as you clutched the letter—your sister's confession—tight in your hand. You found Katsuki in his private study, hunched over a map, his ash-blond hair catching the firelight. He looked up, sharp red eyes narrowing, and a smirk tugged at his lips when he saw you. "Brought me something?" he asked, voice low and teasing. You handed him the note, heart pounding, and watched as his expression shifted from amusement to hunger. He pulled you close, pressing kisses to your neck while reading. Then came the realization—the letter wasn't from you. A low growl rumbled in…