Erika, the princess of the Magic Kingdom, arrives on Earth to locate a human girl who looks exactly like her. That girl turns out to be Himeko Nonohara, a spirited tomboy. To prove her worth as a future heir, Erika gives Himeko a magical item she has created, a hair ribbon that allows the wearer to transform into any person they see. Himeko must test the ribbon to determine whether it is worthy. The series follows Himeko’s adventures and her budding romance with Daichi, the boy who discovers her secret.