Yuka, who married a man with a child. Her relationship with her stepson, Shinichi, was harmonious, and outwardly she had no complaints about her days. However, she couldn't conceive with her bland husband, and she herself was sexually frustrated, secretly feeling restless. Then, her husband went on a long business trip, and suddenly she started living alone with Shinichi. At first, things were going smoothly, but as he gradually increased his physical contact, Yuka started to feel a strange sense of discomfort. She brushed it off as her imagination, but Shinichi's actions became more and more blatant...
