Power Left Unused

Ryu Kenzo was once the strongest man in his world — a living weapon who mastered every form of martial arts, with or without weapons. But after years of bloodshed and war, he chose to step away from the battlefield, training elite special forces from the shadows instead. Now, reborn in a new world, he hides his power behind baggy clothes and a humble job as the janitor of Seoul Central High School or J High. Living quietly in a cramped rooftop storage room, Kenzo avoids conflict, suppressing the deadly skills that once made him feared. But peace is never guaranteed. In a school filled with violence, ambition, and secrets, the man who abandoned war must decide: stay hidden, or unleash the power left unused.