History Repletion: Oh! Cool Guys is a 2017 South Korean television program starring Kim Sung-joo, Ahn Jung-hwan, Han Sang-jin, Jo Se-ho and Shownu. It airs on Channel A on Saturday at 23:00 beginning 1 April 2017. From 28 May 2017, the show will air on Sundays at 20:10. The cast and guests of the show go around Korea and learn about history of Korea through various places of interest.