

"That summer, I met my first love."
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.
Yong-soon

Father

PE Teacher

Bbak-gyu

Moon-hee
Che-yook's Mother

Moon-hee's Mother

Chief of School Administration

Music Teacher

English Teacher

Principal

Athletic Club Senior

Young Yong-soon

Birth Mother's Old Love

Birth Mother

Art Teacher

Middle-aged Woman

Supermarket Worker

Athletic Club Member

New Gym Teacher

Ethics Teacher