Bang Jongup: 17. Younger of two brothers. He loves hip hop, his dream is become a professional dancer, is very talented despite being so young. It is usually quite, shy and reserved, doesn't like problems. Due to an accident when he was little he was forced to repeat a course, there he met his best friend. He goes to a dance academy every afternoon.

Bang YongGuk: 23 years. Jongup older brother. Like his brother, he loves hip hop, just that he prefers rapping and composing, unlike the less he has no qualms about speaking hir mind at all times, it has been more of a problem. It's a simple guy. Attends college specializing in music.

Kim Himchan: 23 years. Yongguk's best friend, they're known since they can remember. Tall, slender, with a perfect face. For years, openly declared homoual. Always known for his great kindness and gentleness towards others. He attends the same university as Yongguk but do not share the same classes.

Jung Daehyun: 20 years. He met Yongguk and Himchan at the music college, it's his first year. They became good friends. Dating a guy a year younger than him, both have incredible voices. His parents own a important bakery in the centre of the city, place where the whole group usually meets.

Yoo Youngjae: 19. Son of doctors but he does not think to follow the family tradition. Going to a school specializing in singing, not to be a professional singer but if he would like to work as a music teacher at some point. It is the voice of reason in the group and almost always has solutions for everything. It is quite calculating, likes everything goes as planned.

Choi Junhong (Zelo): 16. Younger of two brothers, his father died when he was very young, so just have memories of him, that frustrates him. He feels for Yongguk something really strong but he doesn't know what exactly. Because it is very competitive got the nickname 'Zelo' derived from the greek god of the rivality. It has the ability to rap really fast. It is the best friend of Jongup, classmate and academy mate too.