Kang Ha-neul

Jin-seok

Kim Moo-yul

Yoo-seok / Choi Seong-uk

Moon Sung-keun

Jin-seok's Father / Mr. Park

Na Young-hee

Jin-seok's Father / Madam Min

Nam Myung-ryeol

Professor Choi

Lee Na-ra

Professor Choi's Wife

Jeong Taek-hyeon

High School Yoo-seok

Jung Chan-bi

Girl

Choi Go

Young Yoo-seok

Bae Seong-il

Questionable Man 1

Lee Soon-won

Questionable Man 2

Kang Sin-goo

Jin-seok's Real Father / Precinct Policeman 4

An Min-young

Jin-seok's Real Mother

Park Chae-ik

Mover

Kwon Jae-hwan

Precinct Policeman 1

Oh Hyeon-soo

President Song

Park Kyung-chan

Employment Agency Director

Lee Dong-geun

First Aid

Cho Han-na

Hallway Nurse

Han Da-eun

Hospital Room Nurse

Lee Sung-woo

Arresting Detective 1

Yeon Je-hyung

Police Precinct Student 1

Kim Hyeon-mok

Police Precinct Student 2

Yoo In-soo

Police Precinct Student 3

Kang Hak-soo

Loan Shark 1

Jo Hong-woo

Loan Shark 3

Lim Jung-min

Questioning Detective

Oh Min-jeong

Real Estate Agent

Jeong Mi-kyeong

Neighborhood Auntie

Kim Joo-hwang

Criminal Investigator 2

Ma Jeong-pil

Psychiatrist

Lee Seung-yong

Driver in Accident

Kang Shin-gu

The Real Jin-seok / Police Station Officer 4