
Yong-soon is an 18-year-old high school student. She falls in love with her gym teacher, but she thinks her teacher might have a girlfriend. Yong-Soon and her friends try to find out whether he does have a girlfriend, but they can't find any clues. Making things worse, her father brings a new stepmother from Mongolia.
Cast

Lee Soo-kyung
Yong-soon

Choi Deok-moon
Father

Park Keun-rok
PE Teacher

Kim Dong-young
Bbak-gyu
Jang Hat-sal
Moon-hee

Choi Chan-sook
Che-yook's Mother

Kim Ja-young
Moon-hee's Mother

Park Chul-min
Chief of School Administration

Kim Min-jae
Music Teacher

Choi Yeo-jin
English Teacher

Kim Eung-soo
Principal

Kim Han-na
Athletic Club Senior

Kim Ha-yeon
Young Yong-soon

Kim Young-jae
Birth Mother's Old Love

Lee Na-ra
Birth Mother

Park Ji-yeon
Art Teacher

Chang Hyae-jin
Middle-aged Woman

Kim Keum-soon
Supermarket Worker

Na Ae-jin
Athletic Club Member

Han Sa-myeong
New Gym Teacher
Woo Yeon-seo
Ethics Teacher
Crew

Shin Joon
Director, Writer, Co-Producer
Park Min-sun
Editor
Kwon Young-il
Director of Photography

Cha Won-chun
Executive Producer
Kim Ji-hye
Producer
Je Jeong-ju
Producer
Kim Soon-mo
Producer
Han Ji-sun
Production Design
Jang Joo-hee
Costume Design
Kim Si-hwa
Makeup & Hair
Kim Pil-soo
Sound Supervisor
Chung Min-joo
Sound Supervisor
Kim Jung-sook
Production Sound Mixer
Kwon Jun-ryeong
Lighting Director
Kim Dong-wook
Original Music Composer
Hong Eui-jeong
Martial Arts Choreographer



















