Hajime's friend Ryuta Saki has a crush on Sayaka Kamitsu and they go on a double date with Hajime and Myuki. Back at the school, a guard and a teacher find a broken plaster sculpture and the teacher Nakatsukawa unconscious from a blow by another plaster statue in the Art Lab. When the teenagers arrive home, Inspector Kenmochi accuses Sayaka of the attack because she has the only other key to the room...