The shocking daily lives of middle-aged married women secretly accepting strangers' fingers behind their husbands' backs. Harumi is 50 years old and in her 13th year of marriage. While maintaining her identity as a pianist, her relationship with her husband has grown distant, and they've long been in a sexless marriage. She harbors a secret—accepting another man's touch without her husband's knowledge. Back when she was 40, working at a resort hotel, she was approached by a man in his 30s, a smooth-talking salesman who charmed her into his room. The sensation of a stranger's fingers touching her body became a thrilling new experience. Since then, she's had multiple encounters, accumulating intense and arousing experiences. But recently, those exciting moments have dried up, leaving her in a prolonged state of sexual frustration. Now, she faces a shocking scene—exposing her naked body in front of a camera and spreading her legs for a man she's just met. Here, the emotional and physical turmoil of a mature woman is fully captured.