Sangwoo (상우) is a South Korean singer and rapper under MustM Entertainment. He is a leader and rapper of the boy group MustB and a former member of groups BLAST, PUREBOY, and Underdog (the latter three under the stage name Kain). Gallery Official links Instagram This article is a stub. You can help Kpop Wiki by expanding it. Retrieved from "https://kpop.fandom.com/wiki/Sangwoo_(MustB)?oldid=173975" Categories: 1995 births January births Person article stubs Singers Male singers MustB Underdog BLAST PUREBOY Sangwoo Community content is available under CC-BY-SA unless otherwise noted.