Kang Sang-jun

as Yoon Deok-hyun (6 episodes)

as Jeon Seong-yeol (12 episodes)

as Director Ki (6 episodes)

as Han Seong-chan (12 episodes)

as Mun Ji-on (12 episodes)

as Son Chan-yeong (16 episodes)

as Park Joon-young (30 episodes)

as Yoo Sang-jong (16 episodes)

as Self (1 episode)

as Oh Jin-wook (10 episodes)

as Sang-joon (3 episodes)

as Kim Gi-jun (1 episode)

as Kim Ok-gyun

as Self (1 episode)

as Self (1 episode)

as Hae-gak (1 episode)

as Self (1 episode)