Cho Byeong-kyu

as Ro-han

as Seo Min Gi

as Seo Min-ki

as Jeon Woo-seok

as Do Gun-tae

as So Mun

as Hang-nam

as Han Jae Hee

as Self

as Satenik

as Youngest Detective

as Johan

as Kang Sung Mo (young)

as Go Woo-chul

as Cha Gi-jun

as 김종일

as Kim Jong-il

as Kim Bok-Kyu

as Cho Byung-kyu

as Self

as Ko Hoon-Jung

as young Pil-Joo

as Lee Bong-Soo

as Baek Seok-hee

as Cafe Part-timer

as Cho Chung-hwan

as Kim Min-Joong

as Self