Erika is the princess of a Magical Kingdom and also the creator of the Magic Ribbon. To become Queen, she needs to create a useful magical object. And in order to test the ribbon's usefulness, Erika must give the ribbon to a girl in the human world who looks identical to her, this happens to be Himeko, for a year. Once she gives Himeko the ribbon, she is unable to leave the Magical Kingdom until the year is over, and is only able to watch Himeko's antics through a crystal ball. Although at first Erika is a little worried about giving Himeko such an important item, she quickly becomes very fond of her due to Himeko's warm and cheery personality.