At 46, Manami lost her husband in a traffic accident and was forced to continue living with her stepson. Tormented by loneliness and isolation, she found herself turning to masturbation for comfort. One night, her son discovers her in the act. Overcome with shock and humiliation, she is unaware that her son grows increasingly aroused—soon sneaking into her room late at night. A heartbreaking step away from a dark, painful daily life.