Kim Ha-neul

Hyo-joo

Yoo In-young

Hae-young

Lee Won-keun

Jae-ha

Lee Hee-jun

Pyo Sang-woo

Gi Ju-bong

Jae-ha's father

Lee Ki-woo

Lee Jong-chan

Jeong Seok-yong

vice-principal

Hong Wan-pyo

head teacher

Oh Na-ra

Lesson teacher

Lee Kyung-young

Chairman