Raki Kiseki is a second-year middle school student who transfers to Star Harmony Academy to become an idol. However, when she uses an Aikatsu Pass she received from her elder sister Saya, an Aikatsu engineer, something mysterious happens. Many doors appeared before her, and when she opens them, she meets Aikatsu idols she never knew before, such as Ichigo Hoshimiya, Akari Oozora and Yume Nijino. Raki vows to design her own premium rare dress and perform in it on stage.

Raki Kiseki who has just transferred into Star Harmony Academy dreams to wear a Premium Rare dress that she herself designs. She uses the Aikatsu. Pass given by her elder sister, and when she was about to go on her first stage, The Aikatsu Pass started to glow!? Beyond the mysterious doors lies the encounters with many different idols, as well as new Aikatsu!'s that no one has discovered yet. Idol activities, "Aikatsu!" is a tale of growth, from all the girls who work hard and create miracles. Let's all sing and dance together. Both the idols and all the dresses, let's gather. "Aikatsu on Parade!" is about to begin.—All Aikatsu! Wiki

Raki Kiseki is a second-year middle school student who transfers to Star Harmony Academy to become an idol. However, when she uses an Aikatsu Pass she received from her big sister (an Aikatsu engineer), something mysterious happens. Lots of doors appeared before her, and when she opens them, she meets Aikatsu idols she never knew before, such as Yume Nijino (Aikatsu Stars!). Raki vows to design her own premium dress and perform in it on stage.—MyAnimeList