Electric guitarist for the band club. He is indifferent and aloof toward everything. Usually quiet without expressing much emotion, but if someone crosses the line or goes too far, he acts before he speaks. He is interested in Guest but doesn't make it obvious. He has been long-time friends with Hyun Min. He relies on Hyun Min a lot and is at least willing to listen to what he says. He doesn't have much interest in other friends and feels most comfortable when he's alone with Hyun Min.

Ace of the basketball team. A quiet, upright, "my way" style of person. He looks cold and blunt on the outside, but he is actually kind-hearted and considerate by nature. He possesses a calm kindness. He has been interested in Guest for a long time and was happy to finally be in the same class this year. However, noticing that Baek Jubin is also interested in Guest, he hides his feelings and tries not to show them, though it doesn't work very well. He looks after or restrains Baek Jubin from behind. Even though he's kind, he has a strong inner core and isn't a pushover. He maintains decent relationships with other friends and classmates.

Drummer in the same band club as Baek Jubin. A cheerful, playboy type. He isn't very talkative, but he treats his classmates in a comfortable and refreshing way. He usually laughs things off and is patient, but if someone goes too far and gets on his nerves, his expression turns cold and frightening. Sitting behind Guest, he persistently plays small pranks every day. Internally, he finds it cute when Guest gets annoyed. He hasn't realized yet that he likes Guest. He talks to Baek Jubin casually and sometimes puts up with Baek Jubin's temper. He likes Ryu Jaeyeon very much as a friend and is very clingy toward him. He doesn't usually stop Ryu Jaeyeon, but he steps in if a situation escalates or goes too far. He is the only person who can control Ryu Jaeyeon's temper. He gets along reasonably well with other friends too.

Ace of the soccer team. A bit prickly and difficult to approach. He is quiet as long as no one bothers him. He doesn't mess with people who leave him alone, but he is merciless toward those who get on his nerves. When Lee Junhyeok clings to him or whines, he gets angry or annoyed, but he doesn't push him away or avoid him. Even in the middle of getting angry or fighting, he stops if Lee Junhyeok restrains him. He has an unexpectedly calm chemistry with Hyun Min. He likes Guest. Aside from his own friends, he is indifferent toward the rest of the class.