Senior Seokmin....How can I get you to accept this...

prolog

이석민

A second-year student at Seven Arts and Physical Education High School, the main vocalist of the vocal club, the leader, and the main vocalist of the autonomous club Seventeen. In the Seventeen club, he ignores Soonyoung except when learning choreography and movement from Soonyoung.

권순영

Seven Arts and Physical Education High School freshman, dance club leader, whether in the Seventeen club or the dance club, when teaching choreography or movement, when angry, he is scary and both seniors and peers are scared, but normally, he is so innocent and pure that people ask if he is the same person.

최승철

A second-year student at Seven Arts and Physical Education High School, leader of the hip-hop club, leader of the Seventeen club, a real power player in both Seventeen and the hip-hop club, but is heavily criticized, and is dating vocal club member Yoon Jung-han.

윤정한

A second-year student at Seven Arts and Physical Education High School, vocal club member. She is called Angel Yoon because she has a kind personality like an angel, and her birthday is October 4th, so she is also called Angel Yoon. She is the leader of the hip-hop club and the pretty and talented lover of Choi Seung-chul, the leader of Seventeen.

홍지수

A second-year student at Seven Arts and Physical Education High School, a member of the vocal and leadership teams, an exchange student from LA, but Korean. Likes Lee Chan, a junior from the leadership team and a member of the dance team (both are struggling).

전원우

Seven Arts and Physical Education High School, 2nd year student, hip-hop club, leader, has a sweet relationship with Kim Min-gyu, who is in the same hip-hop club and class as him. He may look cold, but his personality is the complete opposite, he is very charming.

김민규

A second-year student at Seven Arts and Physical Education High School, a member of the hip-hop club and the leader club, and is dating Jeon Won-woo, who is also in the same hip-hop club and class. He is tall, but he is also a bit of a goofball.

부승관

A second-year student at Seven Arts and Physical Education High School, the second main vocalist in the vocal club, annoyed every day by the Minwon couple in the same class, and dating Choi Han-sol, a first-year student, member of the hip-hop club, leader, and younger brother of Choi Seung-chul

이찬

Seven Arts and Physical Education High School freshman, dance club member, leader, likes Hong Ji-soo, who is one year older and also a senior in the leader and vocal club (both are struggling), and is the Iranian twin of vocal club leader Lee Ji-hoon, a freshman

최한솔

Seven Arts and Physical Education High School freshman, hip-hop club, leader club, one year senior, dating Boo Seung-kwan, main vocalist of vocal club, younger brother of Choi Seung-chul, also in hip-hop club

문준휘

A first-year student at Seven Arts and Physical Education High School, she is in the dance club and is in the same class as Seo Myeong-ho. She is a Chinese exchange student, but she is fluent in Korean and even swears.

서명호

A first-year student at Seven Arts and Physical Education High School, in the dance club and Seventeen club, dating Moon Jun-hwi, a fellow student in the same dance club and Seventeen club. Although a Chinese exchange student, he speaks Korean well and even swears.

이지훈

A first-year student at Seven Arts and Physical Education High School, vocal club leader, Seventeen club songwriter and lead vocalist, he looks cute and kind, but he is blunt, curses a lot, and has no joke of charisma. He is the twin of Lee Chan and Iranseong, who are members of the dance club and the leader of the club.