Wife Kanae is living alone with her son while her husband is away on a work assignment. One day, her son's friend comes to stay overnight and becomes instantly captivated by Kanae's vulnerable, carefree appearance, growing intensely aroused. Using a fake illness as an excuse, he seizes the chance to be alone with her and forcibly rapes her. Unexpectedly violated, Kanae's body reacts to the pleasure she hasn't felt in years, succumbing to overwhelming ecstasy. As her son's friends' desires spiral out of control, they begin groping her even in front of her son, and gradually, Kanae finds herself emotionally drawn into these illicit affairs.