The Regular Tardy Student

Kim Seung-ho

Jang Seong-hak

Hwang Jeong-sun

Mrs. Gwacheon

Jeon Young-sun

Suk-jan

Kim Seok-hun

Gab-jun

Kim Wun-ha

Eul-jun

Choi Ji-hee

Bae-yeong

Heo Chang-kang

Hwang Hae-san

Lee Kwang-ho

Byeong-jun

Kim In-seon

Kid

Kim Chil-seong

Chief Detective

Jeong Ae-ran

Mrs. Choi

Ju Seon-tae

Executive Director Ju

Dokgo Sung

Bae-yeong's Brother

Lee Ye-min

Kim Su-i

Lim Hae-rim

Foreman

Park Sang-ik

Mr. Yoon

Kim Mi-seon

Bugler

Kim Se-ra

Sesame Seller

Yum Hea-sook

Schoolmistress

Seok Un-a

English Teacher

Ham Guk-jeol

Madame

Kim Mi-ra

Madame

Song Hwa-chun

Detective

Park Seung-jin

Judo Master

Im Kwon-taek

Director