Raki Kiseki, a sophomore middle‑schooler, enrolls at Star Harmony Academy with the dream of becoming an idol. When she activates the Aikatsu Pass gifted by her older sister, a mysterious event unfolds: numerous portals materialize before her. Opening each one introduces Raki to unfamiliar Aikatsu idols, including Yume Nijino from Aikatsu Stars. Determined, she resolves to create a custom premium outfit and debut it on stage to showcase her talent.
