Before his debut, Woo participated in the rap competition TV show , which led to his breakout debut single ‘We Are’ featuring Loco and GRAY that topped several music charts in Korea for weeks. The artist signed with AOMG in 2017 and since then he released the single 'Anxiety' and EP [Af] and collaborated with fellow artists from the label in a single [Balance] featuring Loco produced by CODE KUNST. Woo captured the audience with his unique presence and proved his potential as an artist through his first full-length studio album [BLACK OUT].