Nagata, whose husband is 35 years older than her, says that she and her husband have been enjoying their time together. However, she was not satisfied with their nighttime activities. One day, he told her, "You can cheat on me. In return, I want you to do the housework properly." She had mixed feelings, but time passed without incident. However, she recently had a physical relationship with her first love, whom she met again at a class reunion, and that one mistake ignited her Kokoro to cheat.