Emrald Kaizen has just transferred to a new highschool, she used to to attend an all girls' school nd she hates men. Her life at a co-ed school seems like hell at first. So she decided to become the ultimate hero for girls, but will her unwavered hatred for men be dissolved by Lee Hyungwon; a South Korean exchange student and classmate of hers who is known as the prince of the school for his good looks? Or will she survive as a men hating girl for the rest of her school days and life?