Emrald Kaizen has just transferred to a co-ed highschool. She used to attend an all girls' school and she hates men. Her life at a co-ed school seems like a hell at first. Will her unwavered hatred for men be dissolved by Lee Hyungwon; the South Korean exchange student and classmate of hers who is known as the prince of the school? Or will she survive as a men hating girl for the rest of her school days and life? What mysteries awaits them?