One day, Ayumi Yuge discovers that her husband is having an affair with the mother of her son's friend. After learning the truth, she begins to spiral out of control—flashing her panties whenever the boy visits, giving blowjobs, sending her son out on errands to make time for sex, and aggressively seducing him. This isn't just about releasing frustration; it's revenge against her husband. She deliberately draws in the woman who slept with her husband by using her own son as a connection. As the situation escalates, the film explores Ayumi's shifting emotions and actions, and how her marriage and family bonds are torn apart. A deeply intense story of familial collapse and emotional conflict.