"Monstar" depicts the lives of ordinary teens who are injured psychologically and heal themselves through the power of music. Yoon Sul-Chan is the vocalist for the group "Man in Black". He carries deep wounds within his mind, but doesn't express his feelings. Because of his hot temper, he causes trouble. His management company then orders him to carry himself as an ideal student. He joins a music band at school, while facing unexpected events.
Yoon Seol-chan
Min Se-yi
Jung Sun-woo
young Jung Sun-woo
Nawin Thammarat
Kim Na-na
Han Ji-woong
Min Gwang-ho
Choi Kyung (young)
Manager Hong
CEO Go
Ma Joon-Hee
Shin Jae-rok
Men in Black member
Men in Black member
Men in Black member