A girl discovers a power that lets her meet every idol who ever mattered in this universe, and the show spends 25 episodes actually earning the weight of that gift. The production knows exactly what it's doing: this is a love letter to everyone who watched Aikatsu before, a parade where the past doesn't get forgotten. You watch Raki design her own path forward while surrounded by the ghosts of everyone else's journey, and somehow that makes her story bigger, not smaller.
Raki Kiseki, a second-year middle schooler, moves to Star Harmony Academy with dreams of idol stardom. She carries an Aikatsu Pass from her older sister, who works as an Aikatsu engineer. When Raki uses the pass, something strange happens: many doors appear in front of her. Opening them brings her face to face with Aikatsu idols she has never known, among them Yume Nijino. Raki sets herself the goal of designing a premium dress of her own and performing in it on stage. The music and slice of life series runs for 25 episodes.