Kim Jong-kook
After leaving "Nonstop", Haha spent two years alongside singer Taw, to prepare and record his debut album titled, "The Beautiful Rhyme Diary". The album was released on February 18, 2005 alongside his debut single, "Love Song" but it failed to chart or garner popularity. He eventually guested on "X-man" on May 22, 2005 and became popular for his imitations of close friend, "Kim Jong-kook". His sudden popularity spike allowed him to become a regular guest for X-man, arguably the biggest variety show of that time.