ONEUS is boy group formed by RBW. The group consists of six members: RAVN, SEO HO, LEE DO, KEON HEE, HWAN WOONG and XION. SEO HO, KEON HEE and HWAN WOONG participated in the second season of Mnet’s survival program Produce 101 as RBW trainees during the first half of 2017, and RAVN and SEO HO participated as male trainees under RBW on YG’s survival show, Mix Nine, during the second half of 2017. The group released their Debut Mini Album, LIGHT US, on January 9, 2019 with title “Valkyrie.” On May 29, 2019, the group made a comeback with Mini Album RAISE US. Members LEE DO and RAVN took part in writing the lyrics for the title “Twilight.”