Penniless, betrayed, and nearly being homeless, turned Lily's world into a hell overnight. At the most desperate time, a mysterious hooded old lady offered her a help and gave her a dragon seal with a red thread and name card of a property owner who were destined to help her from her unfortunate fate. Turned out the building she reached to was "D.U Residence", the most luxurious and high class penthouse residence all over the country. The owner himself was the most handsome and finest guy she ever met. She hesitantly got into the building but she ended up receiving unexpected friendly welcoming gestures from all. Little did she know, "D.U Residence" was not an ordinary place and hid so many secret. This was the place where all demons and non-human creature resided when they roamed the earth and the owner of it was the Demon Crown Prince. She trapped into the fight between the Demonic Clans war and all the supranatural moment which normal human would never be. The most shocking thing of all : She was the only human being there and fated to be the crown princess and married the hot but cold and heartless crown prince to save the universe from chaos. Could she run away from her strange fate or could she stay there and finally love the cold heartless jerk crown prince to save the world?