Yongsoon

Lee Soo-kyung

as

Yong-soon

Choi Deok-moon

as

Father

Park Keun-rok

as

PE Teacher

Kim Dong-young

as

Bbak-gyu

Jang Hat-sal

as

Moon-hee

Choi Chan-sook

as

Che-yook's Mot...

Kim Ja-young

as

Moon-hee's Mot...

Park Chul-min

as

Chief of Schoo...

Kim Min-jae

as

Music Teacher

Choi Yeo-jin

as

English Teacher

Kim Eung-soo

as

Principal

Kim Han-na

as

Athletic Club ...

Kim Ha-yeon

as

Young Yong-soon

Kim Young-jae

as

Birth Mother's...

Lee Na-ra

as

Birth Mother

Park Ji-yeon

as

Art Teacher

Jang Hye-jin

as

Middle-aged Wo...

Kim Keum-soon

as

Supermarket Wo...

Na Ae-jin

as

Athletic Club ...

Han Sa-myeong

as

New Gym Teacher

Woo Yeon-seo

as

Ethics Teacher