Ka-Ran and Nam-Joon were classmates in elementary school. Ka-Ran is a tomboy who prefers trousers to skirts, and loves Tae Kwon Do more than her piano lessons. Nam-Joon on the other hand is Mr. Perfect and Wonderful who’s got the good looks and the fine brain. No doubt, he is the most popular guy among the girls. One day, Ka-Ran witnesses the scene where Nam-Joon gives away the sweet bun which he got from Ka-Ran’s friend to another girl. Ka-Ran throws herself at Nam-Joon and beats him up. From then on, their “nightmare” begins and their life connected together since then and even after they have left their school.
They meet again when they are adults and right after breaking off with their others half. Arguments and conflicts still continued but then they realized that the others is the fated person in their life.
講述從童年時期的一對冤家男女以及他們身邊的親人、朋友的青春愛情喜劇。這部電視劇講述著現在的他們，也會在節目結尾時以採訪的方式講述小時候的他們，就像一本充滿回憶的相簿，外表普通有點舊舊的，但翻開時裏面卻是燦爛的、有趣的美好回憶，搭配著可愛的、輕鬆的又或是搞笑的背景音樂，讓這齣劇變得更活潑有趣。乾淨清爽，餘韻悠長，是部另人看完還會會心一笑的電視劇。
