Seo Joo Hyun, goes by Seohyun, dream of becoming a composer. She writes good song on her own and want to show to the world how her song are amazing. Unfortunately, luck was not on her side when she late for an interview to become a composer. But in replace, she became a manager for a celebrity. There she meet JB. Not knowing each other that well, their relationship builds up. Although not knowing any celebrity beside JB, she meet another celebrity and befriend