Tall and glamorous, Mio Kayama writhes in pleasure as her high-cut swimsuit digs into her crotch! One day, Mio, a female teacher at a private school, injures the son of the school's chairman, a student who is also the ace of the swimming team. The chairman then calls her in and gives her a leotard to look after the swimming team until her son recovers from his injury. Unable to refuse, Mio changes into a tiny swimsuit, but she cannot hide her private parts, and the swimsuit digs into her crotch so tightly that her body begins to writhe obscenely...