Ryoko is the popular shopping district's Madonna, known for her overflowing maternal love and oozing sex appeal. One day, at the request of the club president, Tabuchi, she is asked to participate in the neighborhood athletic meet and immediately begins practicing. After practice, Tabuchi, the mechanic Tatsu, and Ryoko are having a party, when they start talking about Tatsu's virginity... Ryoko is excited by Tatsu's naivety and, with Tabuchi's guidance, tries to teach her the good things about women. Tabuchi, who has been secretly watching, can't contain his excitement, and even after the act, Ryoko's body is throbbing...