A year after their marriage, Yuri has been enjoying a fulfilling life with her husband and step-son, Yuichi. Their relationship was good, and they were happy together every day. However, her husband was rather passive and secretly felt lonely physically... One day, her husband had to go on a business trip alone, leaving Yuri and Yuichi to live together as a duo. At first, they continued living normally, but gradually, Yuichi's behavior began changing... He started getting closer to her, both emotionally and physically, which made Yuri feel uneasy. And then, things got increasingly intense... *The content may vary depending on the distribution method.