Shuri Yamaguchi, a married woman, lives alone with her college-aged son while her husband is away on a long business trip. Her son, preparing for job interviews, is troubled by the fact that his room has become a gathering spot for his friends. One day, while heading to take a bath, she walks in on one of his friends masturbating naked in the tub. From that moment on, her ordinary life changes completely. She begins to be seduced and touched by her son's young friends, torn between pleasure and guilt, her emotions thrown into chaos. As her relationships with these young men grow deeper, she gradually loses her self-control. A shocking story unfolds as her pride as a married woman clashes with her growing desires.