Fight, fight, fight.. The only three words that we can describe this cat and dog. Since the first day Baekhyun came to Cube University, World War III started between him and boyish girl, Eunji. Almost 3 years they fighting, screaming, pull each other hair and I can't even describe their rudeness. Eunji, all teacher afraid to teach her, not just rude, she also stupid and always got last place in class. Her hobby? Eat, eating, ate.... Baekhyun is neither clever nor stupid. He just average. Top 50 student in school. He is not rude but hot-tempered person. Fighting for 3 years mean, they have been close to each other for 3 years. Their friends, Chanyeol and Bomi just can't take it anymore. They are like a bodyguard who always stop them from arguing. The presence of new student makes their war even worst. How can they stop fighting or can they? Or they will always fighting until death?