[DeepL Translation - needs review] Volume 1 Introduction: The murder of a high school girl in Kanagawa Prefecture. Sana Arisaka, a freshman at Kageno High School in Kawasaki, was brutally murdered along with her parents. It was an open secret that the murderers were a group of delinquents consisting of Sana's classmates and upperclassmen from the same school, but the police were unable to provide any conclusive evidence, and their evil deeds never stopped. However, the situation takes a sudd...
