Our School's E.T.

Kim Soo-ro

Cheon Seong-geun

Park Bo-young

Han Song-i

Lee Chan-ho

Ok Gi-ho

Kim Hyeong-beom

Cha Seung-ryong

Kim Ki-bang

Meok-tong

Park Jin-taek

Jin-gook

Kim Yeong-ok

Seong-geun's Mother

Ha Jung-woo

Doctor

Jang Hee-Su

Gi-ho's Mother

Lee Yong-yi

Eun-sil's Mother

Lee Hyung-Kwon

Vice-principal

Gong Ho-seok

Teacher Choi

Lee Han-wi

Principal

Kim Sung-ryung

President Lee

Moon Chae-won

Lee Eun-sil

Lee Min-ho

Oh Sang-hoon

Baek Sung-hyun

Baek Jung-goo

Lee Eon-jeong

Chemistry Teacher

Kim Byeong-ok

Publishing Company President

Kim Won-jin

Referee