Yang Kyung-won

as Chang-seok

as Yoon Tae-oh (12 episodes)

as Yang Seung-bin (2 episodes)

as Yoo Hyun-bo (16 episodes)

as Jeon Dae-young (16 episodes)

as Yang Su-won (12 episodes)

as Gong Jihoon (16 episodes)

as Park Doo-shik (8 episodes)

as Self (2 episodes)

as Lee Cheol-wook (20 episodes)

as Self (1 episode)

as Pyo Chi-soo (16 episodes)

as Photographer (1 episode)

as [director of the competition] (1 episode)

as NIS agent