Suddenly, Kousuke's mother, Yuri, told him she was going to remarry. Although Kousuke was grateful to Yuri for raising him single-handedly, he had only ever felt filial emotions towards her. However, after going to meet his mother's fiancé, Maruyama, and talking with him, his feelings changed. He felt a sense of loss at the thought of his unique mother being taken away by someone else, as well as anxiety about leaving the old family home and starting a new life... Various complex emotions intertwined within him. Then, he was overcome by the feeling that he didn't want anyone else to have Yuri as a woman.
