Cosmic Boy (birth name: Lee Jae Jun or 이재준) is a Korean hip-hop producer based in Seoul, South Korea. He is a member of WYBH (우주비행 or “oo-joo-bee-hehng; translates to "space flight”), the hip-hop crew created by Korean rapper / producer Giriboy. He is known for his frequent collaborations with fellow crew members Giriboy, Kid Milli and OLNL, in addition to producing songs for more mainstream K-pop acts such as JUS2. His songs can be recognized through his signature tag, “Can I Cosmic.”