Housewife Miu lives alone with her son while her husband is away for work. One day, one of her son's friends claims that her son has been bullying him, leaving her shocked and distressed. Taking advantage of her vulnerability, the young man forces her into performing oral sex. Unaware that his story is a lie, Miu initially resists fiercely. However, as her own sexual frustration takes over, she gradually gives in and becomes deeply involved in increasingly intense sexual encounters. As the situation spirals out of control, Miu loses the ability to restrain herself.