It's been almost a year since their marriage, and Yuri has been living a fulfilling life. Her relationship with her stepson, Yuichi, is good, and she feels happiness every day. However, her husband is bland and secretly feels a lack of physical intimacy... At that time, her husband was assigned a solo posting, and she began living alone with Yuichi. At first, everything was fine, but gradually, Yuichi's attitude began to change... The distance between them seemed to shrink, and the amount of physical contact increased, leaving Yuri confused. And then it escalated...
