Kim Ki-doo

as Secretary Go (12 episodes)

as Jeong-hoon (12 episodes)

as Tae-ho

as Dae-geun (Youth Association President)

as Han Deok-soo

as Park Young-choon (12 episodes)

as PE teacher (1 episode)

as Jun-gil

as Hwang Geum-dong (16 episodes)

as Joo Yong-joo (17 episodes)

as Heungsinso CEO (1 episode)

as Man-deok (20 episodes)

as Ahn Mu-in (16 episodes)

as Duty officer

as Kang Sang-gu (12 episodes)

as Bang Deok

as Gomchi

as Gi-doo

as Chang-gil

as Self (11 episodes)

as Park Joon-Yong (32 episodes)