After meeting with her brother Issa, Sayu learns that she has just one week left. In order to allow herself to look to the future, Sayu steels herself to reveal the events of her past to Yoshida and Asami—an intense past buried in trauma and regrets. "In my second year of high school . . . I was all alone." Sayu's past, at last unveiled. The reason she left home. The truth is finally brought into the light!