Kill Boksoon

Jeon Do-yeon

Gil Bok-soon

Sul Kyung-gu

Cha Min-kyu

Kim Si-a

Gil Jae-young

Esom

Cha Min-hee

Koo Kyo-hwan

Han Hee-sung

Kim Seung-o

Shin

Lee Yeon

Kim Young-ji

Hwang Jung-min

Kim Gwang-il / Shinichiro Oda

Choi Byung-mo

Hyun-chul

Kim Ki-cheon

Su-guen

Park Kwang-jae

Gwang-man

Jang In-sub

Yoon-sub

Jang Hyun-sung

Bok-soon's Father

Lee Jae-wook

Young Cha Min-kyu

Lee Hae-yeong

Oh Jung-sik

Ki Joo-bong

Ki

Kim Joon-bae

Bae

Lee Young-suk

Suk

Kim Yong-jun

Yong

Park Se-hyun

Young Gil Bok-soon

Im Jae-in

Lee So-ra

Choi Hyung-joo

Yoo Cheol-woo

Lee Seung-yeon

So-ra's Mother

Kim Jae-hwa

Cheol-woo's Mother

Yoon Kyung-ho

Principal

Jo Hyun-wu

Detective

Kim Hyun-jae

Kyung-pyo

Yoon Se-woong

Announcer

Lee Ru-ahn

Teacher

Ahn Seong-bong

M.K Information Desk Staff

Kim Dae-han

M.K. Writer

Choi Yoon-bin

Corpse Cleaner 2

Park Geun-jeong

Killer

Sin Chae-rin

First Class Lounge Child