Hasumi Yuichi (Ichihara Hayato) lives with his mother, stepfather and younger brother in a quiet town. He and his classmate Hoshino Shusuke (Osunari Shugo) are in the same kendo club, and the two become good friends. Hoshino was originally a student with excellent character and academic performance, but he was envied by his classmates. When a group of classmates came back from Okinawa during the summer vacation, Hoshino seemed to have changed. Then Hoshino began to bully his classmates for fun, and his methods were cruel, and Yuichi was not immune. Yuichi is a loner and likes the singer Lily Chou-Chou. On the Lily Chou-Chou forum he founded, he met a person named "Ao Neko". Yuichi and Ao Neko both live a difficult life. The two encourage each other and agree to meet at Lily Chou-Chou's concert. The appearance of "Ao Neko" surprised Yuichi.