Jang Dong-yoon

Do-won

서벽준

Jin-soo

결휘

Han-yong

권소현

Ji-woo

장명운

Sang-il

Kim Young

Choon-ho

Chae Won-been

Eun-ha

Park Geun-cheol

Han Su-ah

Yeon-ok

안민영

Teacher

Oh Chang-kyung

Sang-il's father

정지철

Man

천명재

Student Affairs Director