The Beat Goes On (2012)

Cast
Bong Tae-gyu (봉태규) as Seo Chang-dae (서창대)
Lee Yeong-hoon (이영훈) as Kim Min-soo (김민수)
Kwak Ji-min (곽지민) as Jo Ah-ra (조아라)
Defconn (데프콘)
Byun Sung-Hyun (변성현) as Choops (춥스)
Lee Jae-won-I (이재원) as Seung-tae (승태)

Previously known as "Youth Groove"

Trailer

Synopsis
Meet the secret hip-hop group "Rampage" live and on stage.
Leader Chang-dae (Bong Tae-gyu), MC Min-soo (Lee Yeong-hoon) and vocalist Ah-ra (Kwak Ji-min) make up the cool and popular underground Hongdae hip-hop trio "Rampage". All is going well until Min-soo gets picked up by a record company and the group faces breaking up. Three years later, Chang-dae sees Min-soo on TV, now rich and better off than him, and he dreams of another chance to make it big. He then seeks out Ah-ra to find the whereabouts of the "S" video he starred in long ago. What exactly happened to the group three years ago?