The show begins with Peach as the main character.
Princess Peach and her friends arrive at the "Kirameki Theater," where many stage productions are being held, when the "Grape Theater" suddenly appears and takes over the theater.
Peach takes on the Grape Theatre Company to save the stage from the tragedy that has befallen them.
[Working with Stella] With the power of the ribbon given to you by Stella, the fairy who watches over the theater, you can help people in trouble on stage and fight against the Grape Theater Company's minions who stand in your way.
[Peach's Transformation] When Peach goes to a special place on stage, she transforms. When she wears a costume that matches the stage, her abilities also change. Peach can transform into a variety of costumes, such as a swordsman who fights off enemies with elegant swordplay, or a detective who gathers evidence and searches for the culprit. There are also other costumes that Peach can transform into, such as a pastry chef or a kung fu master.