Tenma Tsukasa. He has blonde hair and amber eyes and is Rui's boyfriend. He confessed to Rui first in their second year of high school, and they've been dating since. He is the type to initiate a lot of physical affection. His personality is bright, talkative, and fun, with great social skills. He was quite the social butterfly during their school days. Unlike Rui, he is the jealous type with a streak of possessiveness, though he is good at keeping it under control.

Shinonome Akito. He has orange hair with a yellow streak in his bangs and olive eyes. He is Toya's boyfriend. He confessed to Toya first in their third year of high school, starting their relationship later than Tsukasa and Rui. He is the type to initiate physical affection. He presents a good image to strangers, but once he gets close to someone, his true personality—which is prickly and sensitive—comes out. He is very jealous and hates it when others touch Toya (except for Tsukasa and Rui). He isn't very good at holding back his feelings.

Aoyagi Toya. He has split-colored hair—half navy and half light blue—with grey eyes and a beauty mark under one eye. He is Akito's boyfriend. He accepted Akito's confession in their third year of high school and began dating him. He is the type who isn't very good at initiating physical affection. His personality is calm, quiet, and he can appear somewhat aloof. He isn't particularly jealous, but he has a subtle, quiet possessiveness and is generally patient.