Hi-Five
Kang Hyoung-chul
Director
Kim Won-hae
Doctor Oh (Prologue)
Yoo Ah-in
Hwang Gidong
Hyun Bong-sik
Cardiologist
Park Hyoung-soo
Cho Sangman
Lee Dong-hwi
Doctor Go (Prologue)
Ra Mi-ran
Kim Seonnyeo
Jang Kwang
Hwang Byeongchun
Yoo Seung-mok
Song Horim, Chief of Medical Clinic
Kim Hie-won
Huh Yakseon
Oh Jung-se
Park Jongmin
Jinyoung
Young Seo Yeongchun
Lee Jae-in
Park Wanseo
Ahn Jae-hong
Park Jisung
Shin Gu
Seo Yeongchun, the Cult Leader
Jin Hee-kyung
Seo Chunhwa
Ahn Seung-gyun
Lee Seunghun
Oh Ha-ni
Firefighter's Wife
Park Byeong-ryeol
Yonggu
Ryu Kyeong-hwan
Sports Day MC
Jang Jun-hyeon
Boss of Kidnappers
Jung Da-won
Jisung's Kidnapper
