Kimika, who heard that her son, who is associating with a delinquent group, is in danger of being expelled, seduces the new teacher with her bewitching beauty and big breasts and somehow manages to get her son to promise to advance to the next grade. However, the whole thing was seen by Ikeda, the leader of the delinquent group. Later, Ikeda comes to Kimika and asks her, "If you want to break ties with us, do something naughty." By chance, her son comes home and the two of them hide in a panic, but Ikeda seems to have thought of something and grins, and takes her out in front of her son's room...