Kuzumi Hiroshi moves with his crippled sister Mana and his father to the remote city of Jouga, which is famous for its Hassaku citrus and the rumors that a species of enormous wolves once lived in the area. While some of the residents are more than friendly, when people begin to vanish suddenly, it becomes apparent that something sinister is afoot... Who is Tsumuhana Isuzu, the strange girl who claimed to have fallen in love with him at first sight? And what is his mysterious classmate Kushinada Nemuru hiding?