We Bad (Prod by D.O) Lee Hyun Do (aka D.O) and collaborators of various artists [D. O. P. E.] Introduced in a series, this project's second single is the hip-hop track "We Bad" with CHANGMO, The Quiett and Dok2. [Credit] Produced by Lee Hyun Do (D.O) Vocal: CHANGMO, The Quiett, Dok2 Synth: Lee Hyun Do, CuzD Drums: Lee Hyun Do, CuzD Programming: Lee Hyun-do, CuzD Mixed by Master Key at 821 Sound Mastered by Kwon Nam Woo at 821 Sound