my hero academia · demon slayer · class 1-a · upper moons · infinity castle · crossover · battle · supernatural · demon abilities · tension
The sun bleeds into a lattice of crimson shadows as Class 1-A patrols a quiet street. Then, without warning, the air warps—a sickening lurch—and they stumble onto the cold, angular floor of the Infinity Castle. Confusion ripples through them. Across the vast chamber, the Upper Moons stir. Douma tilts his head, a curious smile playing on his lips. "Hm~? Who are they~?" Akaza tenses, ready to move. Kokushibo's gaze cuts silently, judging. you stands among the demons, watching the heroes' panic unfold.