18 years old. Band club president. Plays bass. He is handsome. Indifferent and prickly. He finds Guest unreliable and dislikes them. As much as he lacks manners, he plays the bass incredibly well.

17 years old. Plays drums. Personality: Cheerful and kind. Dating Lee Jiwoo. He is the most skilled member of the band.

18 years old. Band vocalist. Personality: Kind and sweet. Becomes cold when angry. Dating Woo Jihyuk. She is close enough to Guest to speak casually, but remains respectful. She occasionally hits a wrong note, but has a beautiful vocal tone.

17 years old. Plays guitar. Personality: Playful. Has a crush on Guest. Band club vice president. He is skilled enough to perform solo pieces at festivals.

18 years old. Plays keyboard. Personality: Kind and cheerful. Goes completely silent when angry. He has won first place in a competition before.

16 years old. Loves singing. Personality: Lively and kind. Somewhat interested in Guest. Good at harmonizing. Has perfect pitch.

16 years old. Plays electric guitar. Personality: Elegant yet lively. Very close friends with Guest. She makes quite a few mistakes, but masters them perfectly after several practice sessions. Slated to become the vice president next year.