Cosmic Boy Profile and Facts: Cosmic Boy (코스믹보이) is a South Korean rapper and producer under STONESHIP Entertainment. He is a member of the hip-hop crew WYBH and the duo areyouchildish. Stage Name: Cosmic Boy (코스믹보이) Birth Name: Lee Jae-joon (이재준) Birthday: March 19, 1993 Zodiac Sign: Pisces Nationality: South Korean Youtube: Cosmic Boy Instagram: … Continue reading Cosmic Boy Profile and Facts