Ahn Ji-ho
Hoon
안내상
Mu-jin
윤유선
So-yeon
Uhm Ji-sung
Byeong-tae
No Tae-yeob
Gi-cheol
신세휘
Yeon-hee
Kim Joong-ki
Teacher
Gu Bon-jin
Math
Park Eun-young
Byeong-tae's mother
