Six classmates receive an email from Asuka, who they thought had committed suicide, asking them to meet her later that night. But when they are attacked by a girl in a rat mask, the students realize that someone is out for revenge!
Mei has been in love with Yuya all her life. They've grown up together. But when they reach their second year of middle school, Yuya suddenly professes his love for her older sister, Haruna.
Izumi Sakuragi is a new police sergeant with the Special Investigations Office, which was set up within the Metropolitan Police in November last year. The new investigation team uses DNA analysis and the latest in forensics science to investigate cold cases as well as cases suspected to involve missing persons.
