A new employee arrives at a major spa chain's training program and discovers that every other trainee is a woman. Ordered to serve as their practice model, he gets an erection during the instructor's groin massage and exposes it in front of the entire class. The amused instructor escalates from a teasing handjob until he ejaculates before everyone. The same lucky erotic training continues the next day and the day after, turning him into the women's shared practice toy in a male harem fantasy.