An ordinary girl from a poor family, Park EunKyung works at a bookstore in a city named Pristellia City. Whithout her knowledge, her boss is a Crown Prince Jaejoong who owned the bookstore and he is looking for his partner in order to become a legal king. EunKyung Loves him badly and always admire him and the crown prince also loves her badly. what will happend when a girl suddenly claim that she is the fiancee of Crown Prince Jaejoong, who apperantly confess that she is the princess from neighborhood's kingdom, Princess Alexa. King of Pristellia Country which means Jaejoong's father, force him to marry Princess Alexa according to the country's tradition. Will Crown Prince Jaejoong choose Eunkyung, n innocent girl with sparkling purple eyes or his unknown-fiancee, Princess Alexa, an arrogant person with her curly chocolate hair and quite spoiled?