ong-yun is a high school girl in little mountain village when she falls head-over-heels for a handsome new school teacher, Mr. Jang. What with taking care of her youngest baby brother for her widowed mother and the impossible age difference, it is a roller-coaster ride for her as she tries to become someone special for Mr. Jang while he seems interested in the other new teacher at the school, Miss Yang.

Overview from themoviedb.org