In 2017, he released his debut single "We Are" (Korean: 시차; RR: Sicha) which had commercial success and widespread acclaim.

Woo made his debut through releasing a single "We Are", featuring Gray and Loco on September 4, 2017.

[8] In March 2024, it was announced that Woo has left hip hop label AOMG after his exclusive contract with them has expired.

[10] i-D wrote that "Having spoken publicly about his struggle with anxiety and panic attacks, Woo’s lyrics are just as honest and open as he is – from not being afraid to get dark when expressing his feelings, to revealing details of a romantic relationship.

"[11] On March 8, 2022, Woo donated ₩10 million to the Hope Bridge Disaster Relief Association to help those affected by the massive wildfires that started in Uljin, Gyeongbuk, which also spread to Samcheok, Gangwon.