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

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

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