Akko and her mother have lived together since her father became the captain of a luxurious cruiser. One day, Atsuko accidentally broke her favorite mirror, so she built a grave for it. That same night, the sky brightens, and Akko receives a gift—a compact mirror—from the mirror spirit as a reward for her kindness. Whenever she chants the magic words, the enchanted compact mirror allows her to transform into anything she wishes to be.