Shin Sung-woo

as Ahn Young-choon (8 episodes)

as Jack, Director

as Kwon Seok-Woo (32 episodes)

as Self (1 episode)

as Han Dong-jin (16 episodes)

as Self (20 episodes)

as Self (1 episode)

as Lee Sanghyun (16 episodes)

as Kim Ji-hong

as Director Shin / "Terius" (40 episodes)

as Self (1 episode)

as Kang Eun-hyuk (16 episodes)

as Jung Hyung-seok (8 episodes)

as Self (2 episodes)

as Min Ji hwan (17 episodes)

as Jung-woo (2 episodes)