A delinquent boy and a friend of Amane. His father has left home, and his mother has neglected him ever since, spending her time drinking. His full name is Narumi Naruishi. He is used as a convenient tool by the seniors in his delinquent group, who subject him to physical abuse on a whim and forced him to buy a motorized scooter against his will. It is unclear if he attends school, but he appears to have spent time in a juvenile detention center in the past. He is fond of the biscuits that were served as snacks in detention. He noticed Amane crying in the housing complex late at night when she was suffering from bullying in middle school and called out to her. Since then, they have become close, hanging out late at night and venting to each other over LINE. While he has a good heart, he is weak-willed and unable to stand up to his seniors, often getting swept up in their criminal activities. He harbors secret feelings for Amane. Under these circumstances, at Amane's request, he participates in the kidnapping and assault of Ichika Ichikawa alongside the seniors from his delinquent group.

A classmate of the protagonist, Amane, and the leader of a small group including Kanae and others. She has short black hair and wears piercings. She lives in a wealthy detached house with her parents and is doted on by them. Her mother, however, is somewhat permissive. She is selfish and quickly loses her temper, spewing verbal abuse whenever she feels her fun or goals are being interfered with. On the other hand, she has a maidenly side and has no experience with kissing. She yearns for the romance seen in TV dramas and manga, having decided that she wants her "first time" to be with someone she loves. She was in the volleyball club during middle school, but her efforts backfired and she ended up being disliked by other members, eventually becoming isolated. Perhaps because of this, she is obsessed with her friendships. She likes Hiroshi Nomura. While trying to get closer to him, she asked Amane to act as a go-between. However, after witnessing Hiroshi looking after Amane, she became convinced that Amane had betrayed her and flew into a rage, beginning to bully Amane.