Ko Ji-yong (born July 1, 1980) is a South Korean singer and businessman. He was a member of Sechs Kies, a first generation K-pop idol dance group which disbanded in 2000 but reunited in 2016. Unlike most of the other members, Ko left the entertainment industry and started his own company. He made his first television appearance in years when he appeared at Sechs Kies' reunion special on Infinite Challenge. Due to his family and work commitments he did not sign a contract with the group's new label YG Entertainment or promote with them as a performer but is considered to be part of the group. From January 2017 to May 2019, he and his son appeared on the reality show The Return of Superman. Early life A native of Seoul, Ko was elementary schoolmates with future Sechs Kies bandmate Kang Sung-hun and g.o.d member Son Ho-young. He lost contact with Kang after the latter went to the United States to attend high school. Career Sechs Kies and retirement Ko was recruited by Kang to join the boy band he and his high school friend Eun Ji-won were forming. The group was eventually named Sechs Kies and debuted on April 15, 1997. Ko was the second youngest member. Until the time the group disbanded in 2000, he was greatly loved by fans for his handsome looks and singing voice. Unlike other members, he did not continue his career as a solo singer but he was cast as a host in an internet broadcast and as an actor in a television drama. However, Ko chose to leave the entertainment industry to start his own business. In 2008, fellow Sechs Kies member and leader Eun Ji-won appeared in the entertainment program Come to Play and remarked that he had not seen Ko since the group's disbandment. Fellow vocalist Jang Su-won revealed on Happy Together in 2014 that he was in contact with Ko and confirmed that he was running his own business. Reunion In 2016, Sechs Kies reunited after their disbandment in 2000 through the variety show Infinite Challenge. Ko, who had left the entertainment business permanently after the disbandment to pursue a new career, surprised the members of SechsKies as well as all the fans by appearing at the reunion concert and performing their hit song "Couple". After Infinite Challenge aired, Sechs Kies earned many more fans; their hit songs ranked