Yamatogaoka Academy is the final resting place for notorious delinquents. Ostensibly, the purpose is to reform delinquents, but behind the scenes, a national conspiracy is being hatched. Sexy Mask, a naked, righteous thief, suddenly appears at Yamatogaoka Academy and boldly confronts the discipline committee, who are repeatedly committing evil deeds, but falls into their trap and finally falls into the hands of their enemies. The discipline committee intends to further control the school by maki...