Yuko, a married woman whose husband is away on a long-term business trip, lives alone with her college-aged son. Although she is happy, she may be feeling lonely and wanting excitement somewhere in Kokoro, perhaps because she cannot see her husband. One day, when her son's friend comes to pick up something he forgot, she is attacked and forced into a relationship. From that day on, her daily life is gone. Her son's friend's demands escalate further and become more and more intense. The married woman, torn between guilt and pleasure as her body is played with by a young man, gradually...