Tall and glamorous Mio Kayama writhes with the intense high-leg pleasure that bites into her crotch! One day, Mio, a female teacher at a private school, injures a student who is the president's son and the ace of the swimming club. And she is called by the director and is given a leotard to take care of the swimming club until her son recovers from injury. Mio changes into a tiny swimsuit without being able to refuse, but she can't hide her private part and bites strongly into her crotch, and her body gradually begins to cringe obscenely.