이상한 나라의 수학자

Choi Min-sik

Ri Hak-sung

Kim Dong-hwi

Han Ji-woo

Park Hae-jun

Ahn Gi-chul

Park Byung-eun

Kim Geun-ho

Jo Yoon-seo

Park Bo-ram

Tang Joon-sang

Tae-yeon

Kim Won-hae

Park Pil-joo

Ju Jin-mo

Professor Oh

Kim Hee-jung

Bo-ram's Mother

Kang Mal-geum

Ji-woo's Mother

Joo Ye-rin

Korean Teacher

Jung Seung-kil

NIS Agent

Shin Jae-hwi

Student 5

Kang Joon-kyu

Ui-joon

Kim So-suk

Principal