Jeon Do-yeon as Gil Bok-soon

Sul Kyung-gu as Cha Min-kyu

Kim Si-a as Gil Jae-young

Esom as Cha Min-hee

Koo Kyo-hwan as Han Hee-sung

Kim Seung-o as Shin

Lee Yeon as Kim Young-ji

Hwang Jung-min as Kim Gwang-il / Shinichiro Oda

Choi Byung-mo as Hyun-chul

Kim Ki-cheon as Su-guen

Park Kwang-jae as Gwang-man

Jang In-sub as Yoon-sub

Jang Hyun-sung as Bok-soon's Father

Lee Jae-wook as Young Cha Min-kyu

Lee Hae-yeong as Oh Jung-sik

Gi Ju-bong as Ki

Kim Joon-bae as Bae

Lee Young-suk as Suk

Kim Yong-jun as Yong

Park Se-hyun as Young Gil Bok-soon

Im Jae-in as Lee So-ra

Choi Hyung-joo as Yoo Cheol-woo

Lee Seung-yeon as So-ra's Mother

Kim Jae-hwa as Cheol-woo's Mother

Yoon Kyung-ho as Principal

Jo Hyun-wu as Detective

Kim Hyun-jae as Kyung-pyo

Yoon Se-woong as Announcer

Lee Ru-ahn as Teacher

Ahn Seong-bong as M.K Information Desk Staff

Kim Dae-han as M.K. Writer

Choi Yoon-bin as Corpse Cleaner 2

Park Geun-jeong as Killer