A group of teenagers who have been traumatized compose a story about love, friendship and dreams based on music.
Yoon Seolchan has been deeply hurt deep in his heart but does not show it on the outside. As the lead singer of South Korea's representative boy band MAN IN BACK, he got into trouble due to his bad temper and violated the model student image required by his agency and received a serious warning. After that, the company decided to let him go back to high school to study and reform. He met Gao Xiazhen, a transfer student from China, and became happy friends, and a series of funny stories happened.
Concept: About campus, love, music, pain, youth, secret love, separation