It is said that his mother, Chisato, decided to remarry. Even though her mother, who had struggled to raise her single-handedly, was finally trying to grasp her happiness, Yusuke had mixed feelings. He should be blessed, but the feeling that wells up is a sense of loss that the life with his beloved mother is over. And it was jealousy that he didn't want to give his mother to anyone. I know it's a twisted love. But I can't help but feel this way... That night, Yusuke visits Chisato's bedroom with a certain resolve.
