character - Manager Choi

character - Choi Jo Eun [Director of Korea University Hospital]

character - Narrator (voice)

character - Chun-sik

character - Jajang / Doctor

character - Oh Gook-sang

character - Tick-tock Grandpa

character - NIS Director Choi

character - Hwang Won-hyeong

character - Self

character - Jajang / Doctor

character - Masayoshi Son

character - Self

character - CEO Baek

character - Self - Host

character - Jang Sung-cheol

character - Mr. Jang

character - Jeong-beom

character - Priest

character - Director Ahn

character - Sanung

character - Kim Joo-Myung

character - Chang-gyu

character - Police Superintendent

character - Cha Byung-Joon

character - King Lee Jo

character - Lee Wan-ik

character - Self

character - Self

character - Mr. Min

character - Self

character - Lee Boo-young

character - President Lee

character - Deep Throat (voice)

character - Kim Eung-su

character - Kim Joong-haeng

character - Hwan-dong's Father

character - Chairman

character - Yong-suk

character - Oh Sung-moo

character - No Jae-soon

character - Narrator

character - doctor

character - Editor-in-chief

character - Clergy Dean

character - Mr. Moon

character - Jung Mong-ju

character - Kim Sang-gyu

character - Butler

character - Hong Jae-deok

character - Chi-ho's Father

character - Son Myeong-soo

character - Detective Do

character - Sang-won

character - Park Young-jin

character - Shin

character - Han Myung-hoi

character - Mr. Kim

character - Jung-won

character - Mr. Choi

character - Manager Kang

character - Self

character - Professor Kang

character - Joong-won

character - Ah-gwi's Subordinate

character - Soo-in

character - Mr. Park

character - Editor in chief

character - Im Wan-gi

character - Han-sik

character - Hyo-sub

character - Director Park

character - Chang-se

character - Kim Won

character - Bae Pil-gu