초록불꽃소년단, or Green Flame Boy Band, is a South Korean boy band that debuted in 2020 under the label, 143 Entertainment. The group consists of five members: Seoham, Siwoo, Yongseok, Jaeyoon, and Hyunwoo. They are known for their energetic and upbeat music, which often incorporates elements of pop, hip-hop, and R&B. Their most recent releases include "GREENBRIDGE," "자살소년 (Suicide Boy)," and "Greenroom."