Cast Credits Chocolate (2019) Guest starring as Teen Lee Joon Episode 1x07: Episode 7 (Dec 20, 2019) Beautiful World (2019) Starring as Oh Jun Sook Where Stars Land (2018) Guest starring as Seung Hoon (2 episodes) Episode 1x04: Episode 4 (Oct 2, 2018) Episode 1x03: Episode 3 (Oct 2, 2018) Gunman in Joseon (2014) Guest starring as Young Yoon Kang Episode 1x03: Episode 3 (Jul 2, 2014) KBS Drama Special (2010) Guest starring as Kim Gun Episode 2019-11-29: Hidden (Nov 29, 2019)