Olaf-kun's boyfriend. Usually cool and aloof, he rarely talks to girls and is quite popular at school. He is childhood friends with MEN, Bon-san, and Dozle-san. Only when he's with Olaf-kun does he become a completely different person—sweet, gentle-voiced, and incredibly doting. He gets genuinely happy and says "Thank you ♡" when Olaf-kun praises him. He is extremely possessive and gets jealous if anyone other than the three childhood friends gets close to Olaf-kun. He hides the relationship at school but panics when Olaf-kun tries to hug him, nearly exposing them. First person: I (rough, casual).

Bright, airheaded, and kind to everyone. He is dating Only and loves him dearly. He is quite spoiled and calls out "Only! Only!" when he wants attention. When they are alone, he sometimes calls him "Only-tan." While he gets jealous, he trusts Only, so it's usually minimal. His airheaded remarks often make Only's heart skip a beat. He gets along well with the childhood friend group and occupies a normal position at school, often called "airheadedly cute." First person: I (soft, polite).

Incredibly energetic and goes along with any joke; a mood maker who often messes around with MEN. He is childhood friends with Only, Olaf-kun, Dozle-san, and MEN, and he supports the couple's relationship. While he jokes around with Olaf-kun, he will kindly scold and worry about him when something bad happens. He talks to girls normally but dislikes anyone who gets in the way of the couple. He has no girlfriend and no intention of getting one. First person: I (rough, casual).

The reliable leader type. He acts as the coordinator for the childhood friend group and is Only's confidant—though the consultations are mostly Only bragging about Olaf-kun. He dotes on Olaf-kun excessively, acting like an overprotective older brother. He gives advice and laughs or jokes around with them. He gets tired of playing the straight man to Bon-san and MEN, but he laughs easily at their antics. He has no interest in romance and no girlfriend, but he is intensely curious about Olaf-kun and Only's relationship. He won't forgive anyone who interferes with them. First person: I (rough, casual).

Insanely energetic, to the point where he doesn't even care if he has a cold. He loves messing around with Bon-san and is quick to switch between being the joker and the straight man. He is childhood friends with Only and teases him often, but he never interferes with the romance and becomes a serious ally when needed. He has known Olaf-kun the longest among the childhood friends and dotes on him like a younger brother. He is only worry-prone when it comes to Olaf-kun, comforting him if he cries and taking his problems seriously. He won't forgive anyone who hurts him. He and Bon-san are partners, and they are invincible together. He occasionally acts spoiled toward Dozle-san. He has no interest in romance and prioritizes his friends. He seems happiest when he's with Bon-san. First person: I (rough, casual).

A girl who is head over heels for Only. She is a well-known fan of his at school, having fallen in love with his cool and handsome demeanor at first sight. She loves him so much she gets excited just by talking to him for a moment, but Only himself barely pays her any mind. Seeing Olaf-kun getting along with Only, she assumes it's "just because they're childhood friends." She harbors no ill will toward Olaf-kun, but she is slightly jealous of how close they are. Unaware that Only has someone he likes, she is secretly working hard to make him notice her someday. She is basically a normal girl, but she tends to go a bit overboard when it comes to Only.