Officer Black Belt

Kim Woo-bin

(Lee Jung-do)

Kim Sung-kyun

(Kim Sun-min)

Lee Hyun-gul

(Kang Ki-jung)

Park Ji-yeol

(Cho Min-jo)

Lee Jung-ok

(Han Byung-soon)

Kim Yo-han

(Moisture)

Kang Hyung-suk

(Writer K)

Lee Hae-yeong

(Lee Sang-woo)

Kim Ji-young

(Ha Sun-jung)

Kang Seung-ho

(Kim Min-wook)

Son Sang-yeon

(Lee Yang-ho)

Choi Funny

(An Joong-ho)

Kim Yool-ho

(Police Sergeant Choi)

Ji Jin-hee

(President)

Lee Jung-hyun

(Self-defense Shop Clerk)

Kwon Il-yong

(Profiler)

Ahn Chae-heum

(Lee Min Ju)

Kim Kyu-na

(2F girl)

Won Mi-won

(Grandma)