Kana married a man with a stepson. She was spending peaceful days with a good relationship with her stepson, Yuichi. However, conceiving with her husband wasn't going well, and she felt a secret dissatisfaction... Then, her husband's long-term business trip was decided, and she started living with Yuichi. From around that time, Kana began to feel a strange discomfort with him, who was gradually closing the distance between them. But she couldn't stop it and was carried away, and the explicit skinship increased more and more...