The new school year begins at Amanogawa High School as Kengo Utahoshi encounters a strange delinquent who chides him for throwing a girl's love letter into the river. Later, at Ms. Sarina Sonoda's homeroom class while he using a Burgermeal Foodroid to analyze strange energy readings, Kengo encounters the delinquent as he introduces himself to the class as the new transfer student Gentaro Kisaragi. Despite his scary appearance, Gentaro is a nice guy as he recognizes his childhood friend Yuki Jojima, greeting each other with a special handshake, before giving the soaked letter to Kengo with intentions of being Kengo's friend.