In the movie, a boy named Yuichi Hasumi loves Lily Chou-Chou’s songs. Lily Chou-Chou is an imaginary singer who plays an odd music in this movie, and her fans communicate with each other through internet site named ‘Lily-holic.’ Another fan of Lily Chou-Chou, Shusuke Hoshino, once a friend of Yuichi, was a quiet and sincere student. However, during a trip to Okiwana, he experienced some traumatic accidents related to death and his characteristics completely changes. He starts to torment other students including Yuichi. Yuichi wants to stop him but he doesn’t know how to do so and he cannot help assisting Hoshino’s misdeeds. The only solace Yuichi can find is Lily Chou-Chou’s songs.