What if you find yourself falling in love with a beautiful young woman whom your own dad married?

What happens when love suddenly blooms between two people who are forbidden to love each other? Will they do what they think is right or will they oblige to what their hearts are telling them?

It all started when the clumsy geek Joo Young Ju stands up against the infamous and biggest badboy in Donggun University, Oh Se Hun. He was every guy's nightmare and every girl's dream. Oh Se Hun was feared and respected by everybody. But not Joo Young Ju. What will happen once these two people will be at war?