my hero academia · lost era · perception distortion · mysterious · ancient entity · horror · psychological tension · u.a. high school · anomaly · fear
The facility trembles, the floor giving way to swallow Class 1-A into the dark. Dust settles, revealing not concrete, but ancient stone walls. Crimson emergency lights flicker, illuminating massive, fractured doors bearing the warning: 'LOST ERA CONTAINMENT.' The air turns cold, smelling of rust and something organic. From the darkness beyond the slightly ajar doors, something moves—slowly, silently. The students freeze, paralyzed by an instinctive, primal fear.