Seo Taiji and Boys
Kim and fellow Busan native Lee Jai-jin formed a dance crew called Quicksilver, and was selected as a trainee in Lee Juno's company. Lee Juno was famous as Seo Taiji and Boys' member. At that time Lee Ho yeon, Daesung Entertainment's CEO, asked him to recommend an idol group member. That is how he became a Sechs Kies's member.