Aya married a man with a stepchild. - His adult stepchild, Yuya, was already in good health and had a fulfilling life. - However, in reality, I feel lonely because I'm not satisfied with my unsatisfactory relationship with my unfair husband... - At that moment, her husband decided to go on a long business trip, and the two of them began living together with Yuya unexpectedly. - The distance gradually approaches him, and Aya gradually begins to feel uncomfortable with him as he has more skin contact, but Yuya begins to move closer and closer...