Yuzuka Hanami is a youthful, carefree girl who has the most ordinary of lives. Despite the fact that her father works around the clock and her mother is rarely home, she likes herself and wants to be a good student. Miton, on the other hand, is an extraterrestrial life-form capable of transforming his owner into a magical girl, a warrior who battles evil wherever it appears. However, because there aren't as many adversaries as there once were, Miton has been out of employment for some time. He's starving and homeless, so he's taken up residence in a rubbish heap. Miton seizes the chance to offer his services to Yuzuka when she passes past him one day.