행복은 성적순이 아니잖아요

Lee Mi-yeon

Lee Eun-joo

김보성

Kim Bong-koo

Kim Min-jong

Son Chang-soo

Lee Deok-hwa

Park Gil-ho

최주봉

Homeroom Teacher

Kim İl-woo

Mr. Jung

양택조

Lee Jung-suk

Choi Soo-hoon

Ahn Chun-jae

Choi Soo-ji

Ms. Kang

전운

Principal

Jung Hye-sun

Eun-joo's mother

이해룡

Eun-joo's father