Park Bom's parents died from a car crash when she was very young. So she now lives with her Aunt & takes care of her (=  Later , her Aunt finds a job in Seoul as a clothing employee . So  Park Bom and her Aunt move to Seoul while Park Bom has to face many ups and downs around her new life in a new place . Later , her aunt dies and she has to be independent in her life.She hasn really listened to music after her parents passed away.However

ChaeRin Lee (CL) and Choi Seung  (TOP) have had many encounters during their childhood . He was a hero to Chae Lin because she was often bullied by girls that envied her caring personality , stunning looks , and talent . But Seung Hyun would protect her helping her life become more easier day by day . Sadly , Chae Lin had to move to the states because her parents had gotten a well paid job and they thought that it would give her a better education there . As C

Ailee (Also called "Lee Ye Jin"), has a life filled with hardhsips due to her imporverished family. Her family basically consists of her mother and younger sister , Lee Soo Young.  Ailee realizes that her mother has been going through tough times and stress with the budget and decides to strive for a scholarship to Korea for a year through an exchange student program. She is then put into a very extraordinary host family t