Kim Ki-doo

as Tae-ho

as Dae-geun (Youth Association President)

as Han Deok-soo

as Jun-gil

as Duty officer

as Bang Deok

as Gomchi

as Gi-doo

as Chang-gil

as Choi Maeng-Ja

as Kim Sang-Sun

as Pyung-chang's Classmate #3

as Secretary Go • 12 eps

as Jeong-hoon • 12 eps

as Park Young-choon • 12 eps

as PE teacher • 1 eps

as Hwang Geum-dong • 16 eps

as Joo Yong-joo • 17 eps

as Heungsinso CEO • 1 eps

as Man-deok • 20 eps

as Ahn Mu-in • 16 eps

as Kang Sang-gu • 12 eps

3 eps

4 eps

as Self • 11 eps

as Park Joon-Yong • 32 eps

as Goo-dol • 16 eps

as Kim Gi-du • 1 eps

as Hong Chul-Soo • 103 eps

as Miami • 32 eps

as Baek Gong-ki • 16 eps

as Kim Ik-hong • 16 eps

1 eps

as Man at the men's restroom • 1 eps

as Seo Daewon • 4 eps

as Grim Reaper • 16 eps