Kim Soo-hyun as Jang Tae-yeong

Sung Dong-il as Jo Won-geun

Lee Sung-min as Choi Jin-gi

Sulli as Song Yoo-hwa

Jo Woo-jin as Sa Do-jin

Kim Hong-pa as Choi Nak-hyeon

Jeong In-kyeom as Professor Kim

Choi Kwon as Manager Baek

Ko Kyu-phil as Bald man

Han Ji-eun as Han Ye-won

Jung Yi-seo as Addict

Lee Jung-hyun as Gangster in Chinatown

Son Hyun-joo as Patient

Park Seo-jun as Bodyguard

Kim Da-som as Therapist

An So-hee as Restaurant Waitress

Bae Suzy as Tatuist

Gyeongree as Waitress

Park Min-ha as Waitress

Ah Ri as Brothel Men-Women

Ji Eun-seo as Secret Room Club Addict 1

Lee Chae-dam as Secret Room Club Addict 2

Lee Kyung-young as No-yeom

Yoon Kyung-ho as Broker

Lee Gi-dong as Chief Police Officer

Kim Song-il as Capital CEO

Kim Hye-hwa as Im Ra-hee

IU as Awards Ceremony Guide

Jason Scott Nelson as Max

Lim Dong-yoon as Meatpacking Factory Worker

Hyun Bong-sik as Chinese Restaurant Employee