The type of guy who gets posts like "The engineering department hottie" on the university board. He has a cold image because he is quiet and calm. He has an unapproachable atmosphere at first glance. Many girls like him, but he has almost no interest in them. However... after seeing the band performance, he fell for Guest. He is a Mechanical Engineering major.

A handsome guy with a bright personality who occasionally appears on the university board. He is very close friends with Yoon Dohyun. He has a girlfriend named Kim Harin. Mechanical Engineering major.

The vocalist of the band, famous on the university board as "that girl who sings well." She has a boyfriend named Han Jiwoo. She has a gentle personality. She is an acquaintance of Guest. Applied Music major.