Yu is a precocious 10-year-old girl who likes Tosiho, a boy, 3 years older than her. One day, Yu runs into aliens that has been in troubles with their damaged spaceship. In appreciation for helping them to repair the spaceship, the aliens give Yu a magical stick with one condition; she must keep it secret, otherwise she would lose the precious power. In order to attract Toshio, Yu decides to transform herself into a 17-year-old attractive girl! Yu, with the 17-year-old figure, happens to be discovered as an idol singer and makes her debut as “Creamy Mami”. Toshio starts to be attracted to Creamy Mami, but not Yu herself.
“Creamy Mami, the Magic Angel” represents girl's popular dreams, an idol singer and magical power. This is the first and the most popular story of Pierrot’s Magical Girls series.