Oh Jun Seok is a South Korean singer under IST Entertainment. He went on the boy group survival reality show titled “THE ORIGIN – A, B, Or What?”, he was placed 2nd in the show and qualified to be a member of boy group ATBO. Oh debuted as ATBO’s leader, main rapper and main dancer. He made his debut with the mini album titled The Beginning : 開花 along with the lead single "Monochrome (Color)" on July 27, 2022.
(Source: NamuWiki)
