Go Jae Geun is a South Korean singer and musical actor. He graduated with a bachelor’s degree in Theater from the Seoul Institute of the Arts. He made his debut as part of the Korean-Japanese rock band Y2K alongside Japanese brothers Matsuo Yuichi and Matsuo Koji. The band was active for 3 years, producing 3 full-length albums and enjoying some popularity before they stop promoting and decided to separate. Go continued his career as a solo artist while the two brothers have been part of several bands in Japan since 2001. He debuted in musicals with a role in "Looking for a Hero" in 2009 and released a trot single in 2020.
(Source: Korean = Wikipedia || Translation = MyDramaList)