Mio's son has been bullied at sch*ol for some time, and when she finds out about it, she pursues his homeroom teacher, Kubota, without mercy. Her homeroom teacher receives a package from her parents' house, which contains an old adult entertainment magazine. While casually reading it, he happens to find her listed as the No.1 soap girl. Her homeroom teacher, who was surprised and at the same time resented her, uses the incident as an excuse to blackmail her...