Amahashi Miku is a regular high school girl until the mysterious black cat visits her in her dream. He leads her into the land of Mifta, where princes are waiting for the priestess to choose them as the heir. By choosing an heir, they meant that the priestess has to fall in love with them.
To make things more complicated, these princes are identical to the popular guys in her school, and one of them is even her fiance. Reality and Mifta are more intricately linked together than she suspected, and the longer she takes to fall for the princes, the more danger both worlds are exposed to.