Chisato Shoda is worried about her son's poor grades and consults his homeroom teacher, who responds harshly to the bad results. Concerned, Chisato invites the teacher over, plotting to do whatever it takes to improve her son's performance. However, in the process, she awakens to the pleasure of seducing men and becomes increasingly entranced by its allure. Unaware of her own desires, she begins targeting and dominating every man connected to her son, all while convincing herself it's for his sake.