Protagonist Yu Morisawa is a energetic girl whose parents run a crepe shop called the Creamy Crepe. One day, as thanks for accidentally saving the “Feather Star”, a space ship that was caught up in a storm, a fairy grants her the “magic that makes wishes come true” for a year, in the form of a magic wand and makeup pouch. She also comes to adopt the talking kittens Nega and Posi. After using her magic to transform into a beautiful young lady, Yu is scouted by Shingo Tachibana, the young president of an entertainment agency, after a chance encounter. Suddenly Yu debuts as the idol singer Creamy Mami! Yu finds herself living a double life between going to school with her friends and performing as Mami for her adoring fans.