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
