Hiiro Yamabuki is your normal high school girl who loves eating. The only thing that separates her from other people, is her reoccurring dream of a Western world. One day in the middle of class, she accidentally brushes hands with the transfer student who sits next to her, Sei Konno. The moment they touch...! They are transferred to the world that she always sees in her dreams! And that guy is here too?! She finds herself wearing a gorgeous dress, people are calling her princess, and the transfer student is being called the Prince. Wait... she has to marry him right now? And spend the night together? What is going on?! They're classmates that barely know each other and they've suddenly been transferred to this strange world! Thus their newlywed life starts in this world that they know nothing about!