Because of a change in family fortune, Choi Su-weon (Kim Ha-neul), a homely 21-year old English major, is forced to give private lessons to high school students to cover her college tuition. Unfortunately, it is not as easy a job as she has imagined. She quits her first teaching job after being sexually harassed by a couple of twelve-year olds, and reluctantly accepts an offer to tutor another high school student only after her mother makes it clear that she would otherwise be unable to pay her tuition. Su-weon’s new charge, Kim Ji-hun (Kwong Sang-woo), is the same age as her, having failed the same grade twice.

A spoiled brat known for his pranks and martial arts prowess, Ji-jun has been brought back to Korea by his stern dad (Baek Il-sub) after screwing up while studying overseas. Unfortunately, he is not about to change his ways for the sake of his new, unwelcome tutor. He would rather sneak out and hang around with his girlfriend Ho-kyung (Kim Gi-woo) than hit the books with Su-weon. Furthermore, because she is the same age, Ji-hun shows little respect for his tutor by not showing up for classes or derisively calling her the “country chick.” But, as horrified as she was by the behavior of her new charge, Su-weon was determined not to disappoint her mother, and was unwavering in her attempts to beat some sense into his head.

It was an impossible mix and a hilarious situation. Yet it produced unexpected results