Na Bo Ri is a 25-year-old woman who desperately wants to be a teacher at the high school she was kicked out of due to a misunderstanding with her teachers over injuring a group of male classmates. After getting her GED, she rejects job offers from other high schools and works on becoming a teacher at her old high school so she can work side by side with her high school love interest, the art teacher Ji Hyeon U.
However, the only thing that enables her to get the coveted job is signing a contract to essentially babysit Park Tae In, a troublemaker student who attends the same high school. Tae In, a lonely youth, quickly becomes the "jjang", or "king" of the high school and enjoys playing mean tricks on Bo Ri, whose easygoing personality attracts the attention of the majority of her students. No Jem Ma is jealous of the relationship between Bo Ri and Tae In and goes out of her way to get Bo Ri kicked out but she's not the only one against them.
(Source: MyDramaList)
