Mahiro, a new instructor and the idol of the gym, had been secretly involved with a coworker, meeting in private after work. Their affair was secretly recorded without consent. When a senior colleague discovers the footage, Mahiro becomes a target of sexual harassment, forced to conduct swimming lessons in lewd swimwear. Her youthful, tender body is leered at as she's consumed by humiliation—yet gradually, the pain begins to transform into pleasure. This film captures her psychological transformation and the new, intense experiences etched into her body.