Three years have passed since the legendary Prism Queen Cup. Aira Harune, Rizumu Amamiya, and Mion Takamine have risen to fame as Prism Stars, bringing the glamour and brilliance of Prism Shows to every venue they perform in. However, they face an unforeseen challenge from Mia Ageha, a spirited and energetic girl who has openly announced her goal to defeat Aira and become the top Prism Star. Recognizing her potential, the Prism Show agency Pretty Top signs Mia along with three other aspiring Prism Stars—Karin Shijimi, Reina Miyama, and Ayami Ooruri—to create the idol group Prizmmy. Yet the path to stardom proves difficult: Mia must cope with the sudden reappearance of an old friend, now her rival, while navigating the seductive but deceptive world of Prism Shows. Still, supported by her friends and team, Mia feels even more driven to move forward and shape her own future.