Kim Soo-hyun
— Jang Tae-yeong
Sung Dong-il
— Jo Won-geun
Lee Sung-min
— Choi Jin-gi
설리
— Song Yoo-hwa
Woo-jin Jo
— Sa Do-jin
김홍파
— Choi Nak-hyeon
Jeong In-gyeom
— Professor Kim
최권
— Manager Baek
Ko Kyu-phil
— Bald man
한지은
— Han Ye-won
Jung Yi-seo
— Addict
이정현
— Gangster in Chinatown
Son Hyun-joo
— Patient
Park Seo-jun
— Bodyguard
Kim Da-som
— Therapist
안소희
— Restaurant Waitress
Suzy Bae
— Tatuist
Gyeongree
— Waitress
Park Min-ha
— Waitress
Ah Ri
— Brothel Men-Women
지은서
— Secret Room Club Addict 1
Lee Chae-dam
— Secret Room Club Addict 2
Lee Kyung-young
— No-yeom
Yoon Kyeong-ho
— Broker
Lee Gi-dong
— Chief Police Officer
Kim Song-il
— Capital CEO
김혜화
— Im Ra-hee
IU
— Awards Ceremony Guide
Jason Scott Nelson
— Max
임채선
— Meatpacking Factory Worker