A housewife, Keiko, tutors her neighbor's student, Toshio. One day, when Keiko learns that Toshio is naive about women, she, who has recently had a strained relationship with her husband, is swayed by Toshio's curiosity and decides to teach him about women… Unable to resist the thrill of corrupting an innocent younger virgin, Keiko finds herself sinking deeper. However, her jealous husband, Yasunori, notices her changes and secretly sets up a camera. Unaware, Keiko brings Toshio home today under the pretext of studying…
