Monster boy : Hwayi
Technique
Casting
Kim Yoon-seok
Seok-tae
Yeo Jin-goo
Hwa-yi
Cho Jin-woong
Ki-tae
Jang Hyun-sung
Jin-seong
Kim Sung-kyun
Dong-beom
Park Hae-jun
Beom-soo
Im Ji-eun
Young-joo
Park Yong-woo
Det. Chang-ho
Kim Young-min
Jung-min
Seo Young-hwa
Seon-ja
Yoo Yeon-seok
Park Ji-won
Nam Ji-hyun
Yoo-kyung
Lee Kyung-young
Lim Hyeong-taek
Moon Sung-keun
CEO Jeon
Han Joo-wan
CEO Jeon's Attendant
Lee Yoo-mi
Yoo-kyung's Friend 1
Park Gyu-ri
Yoo-kyung's Friend 2
Park Jin-woo
Detective Jang
Park Myung-shin
Assemblywoman Jeong
Han Chul-woo
Detective Kim
Min Young
Paju Hospital Nurse
Min Bok-gi
Ex-prosecutor
Kim Lok-kyoung
Security Guard
Park Kyung-hye
Union Staff
Son Jong-hak
Police Chief
Park Seong-jun
Student
Woo Jung-kook
Blind Masseur
Son Kang-gook
Police Officer
Im So-mi
Cherry Tavern Young Lady
Lee Jun-hyeok
Police Officer
