Hiroshi, a 16-year-old boy, has started living in Jouga Town, where a big river divides the ex-downtown and new downtown. There are also some mysterious customs in the town. Though he enjoys his life at the new school, only Nemuru, class president, keeps a distance from him. One day, she suddenly tells him, "Don't go ex-downtown...." What will be there...?

Hiroshi, a 16-year-old boy, has started living in Jouga Town, where a big river divides the ex-downtown and new downtown. There are also some mysterious customs in the town. Though he enjoys his life at the new school, only Nemuru, class president, keeps a distance from him. One day, she suddenly tells him, "Don't go ex-downtown...." What will be there...?