Kim Ji-soo
— Yong-bi
수호
— Sang-woo
Ryu Jun-yeol
— Ji-gong
Kim Hee-chan
— Doo-man
김동완
— Yong-bi's Older Brother
Kim Jong-soo
— Chief Oh
최준영
— Detective Choi
Lee Joo-shil
— Sang-woo's Grandmother
Moon Hee-kyung
— Ji-gong's Mother
유하복
— Doo-man's Father
Lee Ji-yeon
— Park Eun-hye
정도원
— Detective Baek
강준석
— Paramedic
한혜지
— Nurse