Kim Kook-heon (Myteen, B.O.Y)

Kim Kook Heon, formerly known as Xiheon, is a leader, main vocalist, and member of the boy group MYTEEN under entertainment company The Music Works. He appeared in Song Yu Vin’s music video ”To the Bone It’s You”. He was a contestant on survival reality show Mix Nine, but eliminated in the episode 14 (final) at 18th rank. He and all the other members of MYTEEN made special appearance on the eleventh episode of the American comedy television series "I Feel Bad" as themself and aired on December 13, 2018, on the American television network NBC. After training for seven years and nine months, he made his appearance as a contestant on boy group survival reality show Produce X 101.
(Source: kprofiles.com, Wikipedia)