Kim Soo-hyun

Character: Jang Tae-yeong

Sung Dong-il

Character: Jo Won-geun

Lee Sung-min

Character: Choi Jin-gi

Sulli

Character: Song Yoo-hwa

Jo Woo-jin

Character: Sa Do-jin

Kim Hong-pa

Character: Choi Nak-hyeon

Jeong In-kyeom

Character: Professor Kim

Choi Kwon

Character: Manager Baek

Ko Kyu-phil

Character: Bald man

Han Ji-eun

Character: Han Ye-won

Jung Yi-seo

Character: Addict

Lee Jung-hyun

Character: Gangster in Chinatown

Son Hyun-joo

Character: Patient

Park Seo-jun

Character: Bodyguard

Kim Da-som

Character: Therapist

An So-hee

Character: Restaurant Waitress

Suzy

Character: Tatuist

Gyeongree

Character: Waitress

Park Min-ha

Character: Waitress

Ah Ri

Character: Brothel Men-Women

Ji Eun-seo

Character: Secret Room Club Addict 1

Lee Chae-dam

Character: Secret Room Club Addict 2

Lee Kyung-young

Character: No-yeom

Yoon Kyung-ho

Character: Broker

Lee Gi-dong

Character: Chief Police Officer

Kim Song-il

Character: Capital CEO

Kim Hye-hwa

Character: Im Ra-hee

IU

Character: Awards Ceremony Guide

Jason Scott Nelson

Character: Max

Lim Dong-yoon

Character: Meatpacking Factory Worker

Hyun Bong-sik

Character: Chinese Restaurant Employee

Oh Ji-young

Character: Private Gambling Place Madame