Lee Min-ki as Han Ki-Soo

Kang Ye-won as Choon-Sim

Kim In-kwon as Kim Myung-Sik

Ko Chang-seok as Detective Seo

Kim Byung-chul as Detective Park

Kim Eun-ok as Miss Lee

Yoon Je-moon as Jung In-Hyuk

Yoo Seung-mok as Lee Do-hyeong

Don Lee as Kim Joo-cheol

Song Jae-ho as Kwak Han-soo

Jeon Kuk-hwan as Aikawa Masaaki

Oh Jung-se as Park Dal-yong

Bae Jang-su as Advertiser

Jang Myung-kap as Engineer

Jo Kyung-hyun as Dae-mang Gang Member 2

Kim Jae-hwa as Bike Enthusiast

Kim Tae-woo as Wanatabe Junichi

Lee Hee-jun as Daemang Chief

Park Ji-yeon as Kindergarten Teacher

Kim So-jin as Team Leader

Lee Da-il as

Joo In-young as Police

Lee Hae-in as Choon-sim's alumni 2