Kim hyora 16 years old is a newbie in Neul paran high school. She made a trouble when she came late to school. She accidentally bumped into Cho Kyuhyun, the coldest boy. and her life was getting worse when she found out that her mother and Kyuhyun’s mother made a promise for their wedlock since they were in belly. In fact Hyora was in love with her sunbae, Jang Woo Young. While Kyuhyun was still looking for his first love. How will they be?