as Professor Seong

as Ga Seong-ho

as Self

as Byeong-hak

as Yoo Han-il

as Won Chang-ho

as Min Yong-jun

as Self

as Self

as Self

as Do Won Bong [Seongju Prison inmate]

as Kyung Pil

as Dr. Myung

as Hwang In-bum

as Self

as Narrator

as Kang Ki-chun

as Hong Sun-jo

as Lawyer

as Kim Tae-Sang

as Congressman Cha Jong-hyeon

as Sang-won

as Yun Young-hwan

as Jin-seok's Father / Mr. Park

as Jang Se-dong

as Self

as Koo Tae-Won

as Jung Ji-yong

as Lee Eui-myeong

as Himself

as Chief Nam Kyeong-dae

as Wan-ho

as CEO Jeon

as President Yoon

as Moon-soo

as Shin Jae-yeol

as Professor Song

as Mr. Moon

as Pan-gon

as Doctor

as Jeon Sang-ok

as Vice Principal (Relay)

as King Daemusin

as Gu Yang-Won

as Hwan

as CEO Jeong (voice)

as Kwon Yong-hwan

as Oh Sung-ho

as Han Yun-sik

as Himself

as Young-soo

as Choo Hyung-Do

as Bae Tae-gon

as Mr. Jang

as Young-soo

as Kim Kyoo-hwan

as Joo-dong

as Me

as Moon Dok-bae / Moon Chae-ku

as Young-sub

as Narrator (voice)

as Self

as R

as Young-cheol

as Kim Ki-young

as DJ