Married for 25 years, recently my husband has been paying more attention to his appearance, and Reiko feels a sense of unease. He goes out more often, and feeling suspicious, she secretly follows him... and unexpectedly meets with Reiko's friend!! While continuing to follow in surprise, she suddenly encounters Nakata, the friend's husband, who was also following. Chasing the two people heading to a hotel, she enters the hotel together... And while listening at the next room, the two people's frustration and sexual desire welled up. Since that's the case, we should do it too, and finally they overlap their bodies...