Oh! My School

Episode 21 (1x21)

Air date: Apr 09, 2011

Cast: Soyeon (T-ara), Lee Joon (MBLAQ), Yang Yo Seob (B2ST), Min (miss A), Hyosung (Secret), Brian Joo (Fly to the Sky), Lee Gi Kwang (B2ST), Eun Ji Won (Sechs Kies, Clover), Gilme (Clover) & Chun Myung Hoon (NRG)