YoSeob hates that guy. The guy that make his life miserable. AC is the name. AC is really pulling YoSeob's leg. In the mean time, YoSeob fall in love. A girl from the next classroom, GooHyun. She's so pretty and kind. Her voice is as soft as silk. YoSeob finally fall in love, for the first time. When YoSeob ask GooHyun to be his girl, she accepted. And YoSeob's heart is shinning after 10 years of darking. Then something seems to go wrong and make YoSeob's life upside down. YoSeob feels like he was back stabbed. Which will he choose? Hate or love?