Kim Soo-hyun

Jang Tae-young

Sung Dong-il

Jo Won-geun

Lee Sung-min

Choi Jin-gi

Sulli Choi

Song Yoo-hwa

Jo Woo-jin

Sa Do-jin

Kim Hong-pa

Choi Nak-hyun

In-gyeom Jeong

Professor Kim

Kwon Choi

General Manager Baek

Han Ji-Eun

Han Ye-won

Sun Ah

Miss. Jin

Go Gyu-pil

Bald

Wan Lee

Jang Tae-yeong double, Secret room club addict

Jae-Sung Jung

Patient

Im Hyeon-joo

Woman 1

Candy Alexa

Choi Nak-hyeon hideout call girl

Chan-woo Jeong

President Han

Gyoo-Hyeon Kim

Holster

Shin Mi-young

Caregiver