Rei

Not much is known about Rei, other than he is the classmate of Group One and a member of Group Five. He is known as the class narcissist, and is seen admiring his own reflection and making cute faces at himself when Satoru creates a mirror for him in class. Satoru is Rei's boyfriend for a rather short amount of time. He had liked Satoru for a while, but never made a move because of Shun before the two of them broke up. However, to Satoru, he only serves as replacement for Shun.