Song Ah Jin's life was less than ordinary, she had been living in Paris, France with her parents who frequently traveled. She had known her sister had gone back to Korea with her aunt after they moved from Japan to America. Ah Jin wasn't surprised when she found out her sister had become a solo artist in Korea and always sent them her albums or singles. She knew her sister as Ji Eun Unnie but the world referred to her as IU.

Her parents one day decided Ah Jin needed to bond with her older sister and shipped her off to Korea. At first it seemed alright....until her sister decided to bring her to work one day.

Welcome to the world of Music Industry.