"Pretty Rhythm Aurora Dream" centers around Aira Harune, a cheerful and energetic middle school student with a passion for fashion and dance. Aira discovers the world of Prism Shows, a dazzling combination of figure skating, dance, and fashion performances that captivate audiences. After stumbling upon a mysterious pair of prism stones, she gains the ability to perform Prism Jumps, spectacular moves that elevate her performances. Aira joins the Prism Star Academy, a prestigious school for aspiring Prism Stars, where she meets Rizumu Amamiya and Mion Takamine, two talented performers with their own dreams and challenges.

Rizumu, a disciplined and skilled dancer, initially clashes with Aira due to their differing approaches to performance, but their rivalry evolves into a strong friendship. Mion, a kind-hearted and supportive girl, becomes a close ally to both Aira and Rizumu. Together, the trio navigates the competitive world of Prism Shows, striving to improve their skills and achieve their goals. The series explores their growth as performers and individuals, highlighting themes of perseverance, teamwork, and self-discovery.

The narrative is structured around the Prism Queen Cup, a prestigious competition that determines the top Prism Star. Aira, Rizumu, and Mion face various rivals, including the talented but aloof Kaname Asahi, who challenges them to push their limits. As the story progresses, the characters confront personal struggles, such as self-doubt, pressure to succeed, and the complexities of friendship. The series also introduces the concept of Prism Spirits, mystical beings that guide and inspire the performers, adding a layer of fantasy to the story.

Throughout the series, the characters' performances are central to the plot, with each episode showcasing their creativity and growth through elaborate Prism Shows. The story balances lighthearted moments with emotional depth, as the characters learn to overcome obstacles and support one another. By the end of the series, Aira, Rizumu, and Mion emerge as stronger individuals, having forged lasting bonds and achieved significant milestones in their journey as Prism Stars.