All Cast
Shin Hye-sun
So Si-min
Lee Jun-young
Han Su-gang
Park Jung-woo
Ko Jin-hyoung
Park Hyeok-kwon
So Young-taek
Cha Chung-hwa
Lee Jae-gyeong
Lee Chan-hyeong
Lee Gwon-joong
Bae Hyeon-jun
Byeong-jin
Cha Woo-min
Lee Moon-gi
Kim Sang-woo
Park Jung-ho
Lee Tae-hee
Kim Jeong-gyu
Lee Tae-gyun
Byun Jae-hyeok
Kang Anna
Song Eun-gyo
Kang Na-ru
Min-ji
Son Sook
Jin-hyoung's Grandmother
Lee Gyu-hoe
Head Teacher
Lee Jung-ok
Seo Sang-woo
Dong Hyo-hee
English Teacher
Nam Jeong-woo
Math Teacher
Kim Gyeong-ryong
Principal
