Insane

Kang Ye-won

as

Kang Su-a

Lee Sang-yun

as

Na Nam-su

Choi Jin-ho

as

Jang Hyung-sik

Ji Dae-han

as

Kang Byung-joo

Kim Jong-soo

as

Director Cha

Cheon Min-hui

as

Mi-ro

Lee Hak-ju

as

Dong-sik

Jang Tae-seong

as

Depeartment He...

Yoo Gun

as

Woo-jin

Choi Youn-so

as

Ji-young

Jo Jae-yun

as

Detective Park

Kil Hae-yeon

as

Su-a's mother

Kim Han-jong

as

Balbari

Kim Won-jung

as

Section Cheif ...

Park Se-jin

as

(uncredited)

Lee Kyu-ho

as

Camera