Ahn Ji-ho

Hoon

안내상

Mu-jin

윤유선

So-yeon

Uhm Ji-sung

Byeong-tae

No Tae-yeob

Gi-cheol

신세휘

Yeon-hee

김중기

Teacher

구본진

Math

박은영

Byeong-tae's mother

Seo Jung-won