Jung Jin-young

as Baek Cha-seung (14 episodes)

as Ha-eung (2 episodes)

as Go Ha-eung

as Kang Seung-woon (12 episodes)

as Yong-man (7 episodes)

as Lee Young-wook (8 episodes)

as Hong Beom-joon (16 episodes)

as Baek-ho (1 episode)

as Man (1 episode)

as Choi Do-hyung (8 episodes)

as Doctor K (6 episodes)

as Jang Ki-do (12 episodes)

as Sang-gyu

as Kwon Ho Yeol / Dan Geuk (16 episodes)

as Expert

as King Jeong-jo

as Future Ahjussi

Director, Screenplay

as Kim Sang-sik (16 episodes)

as Lee Sung-Min (20 episodes)

as Chief Hwang

as Mr. Lee

as Kyungsoo

as Jang Tae-Joon (16 episodes)