Suddenly, Kosuke's mother Yuri tells him that she is remarrying. Although he is grateful to Yuri for raising him alone, he thinks that his feelings for her are purely parental. However, when he goes to meet and talk with her new husband, Maruyama, his feelings change completely. He feels a complex mix of emotions as he feels a sense of loss that his only mother has been taken away by someone else, and anxiety about moving out of the old house where he was born and raised and starting a new life. He is overcome by the feeling that he does not want to give Yuri up to anyone else as a woman...