Kim Hie-won

as Huh Yakseon

as Director of Research Institute

as Doctor Yang

as Sun-woo

as Young-jin

as Lee Chun-seok

as Won Jong-muk

as Choi Il-hwan

as Himself

as Woo Ji-man

as Soon-mo

as Choi Kwang-gook

as Lee Gyu-ho

as Department Head Kim

as Jong-bae

as Patrick

as Self

as Teacher Ttong

as Master Park

as Romanticist

as Teacher Kim

as Jo Hyung-Joon

as Sakamoto

as Kim Hee-won

as Self

as Jung-mi's Husband

as Park Soo-Chil

as Oh Guk-cheol

as Xiangdong

as Byung-gab

as Nam Geon-hee

as Detective Park

as Do-gyoon

as Choi Yoon-Ki

as Himself

as Hwang Man Shik

as Seok-ho

as Self

as Jung Min-Chul

as Lawyer Kim

as Woo-jin 93

as Himself

as Convenience Store Manager

as Park Jong-shik

as Mr. Choi

as Head of a Department Byeon

as Lee Jong-pal

as Park Byung-hee

as Im Taek Soo

as Boss

as Loan Shark

as CEO Go

as Sojung

as Choon-bok

as Himself

as Man-seok

as Jung Yoon-seok

as Detective Kim

as Detective Kim

as Martial Arts Instructor

as Byung-Hwan

as Staff Sergeant Kim

as Kim Jin-man