Akko-chan's family, the Kagami household, has handed down an old palm-sized Western mirror for generations, and when her mother finally gives it to her she treasures it. During a commotion stirred up by Taishou and his gang, she accidentally breaks it, then makes a grave for the pieces and buries them in the backyard. That night a flash of light and a gentle voice wake her. The Queen of the Mirror Kingdom thanks Akko-chan for caring so much about the mirror and gives her a magical compact mirror. Whenever Akko-chan sings the magic words, she can turn into anything she wishes. The result is a 44-episode magical girl comedy built around her secret power.