as Byeong-hak
as Jin-seok's Father / Mr. Park
as Lawyer
as Han Yun-sik
as Joo-dong
as R
as CEO Jeon
as Kwon Yong-hwan
as Kim Ki-young
as Kang Ki-chun
as Oh Sung-ho
as Narrator (voice)
as Moon Dok-bae / Moon Chae-ku
as Me
as Choo Hyung-Do
as Jang Se-dong
as Chief Nam Kyeong-dae
as Kim Kyoo-hwan
as Self
as Professor Seong
as Young-sub
as Mr. Moon
as Mr. Jang
as Doctor
as Lee Eui-myeong
as Wan-ho
as Shin Jae-yeol
as Vice Principal (Relay)
as Jung Ji-yong
as Yun Young-hwan
as Moon-soo
as Young-cheol
as Sang-won
as Young-soo
as Himself
as CEO Jeong (voice)
as Bae Tae-gon
as Professor Song
as Pan-gon
as President Yoon
as Gu Yang-Won
as Hwan
as Jeon Sang-ok
as DJ
as Narrator
as Yoo Han-il
as Min Yong-jun
as Hong Sun-jo
as Congressman Cha Jong-hyeon
as Won Chang-ho
as Dr. Myung
as Kyung Pil
as King Daemusin
as Hwang In-bum
as Koo Tae-Won
as Do Won Bong [Seongju Prison inmate]
as Kim Tae-Sang
