"Kiratto Pri☆Chan" is an anime series centered around the lives of three middle school girls who aspire to become idols using the fictional live-streaming platform, Pri☆Chan. The story begins with Mirai Momoyama, a cheerful and energetic girl, and her childhood friend Emo Moegi, who is more reserved but equally passionate about performing. The two discover Pri☆Chan, a platform that allows users to broadcast their talents to a global audience, and decide to form an idol unit called "Miracle Kiratts" to pursue their dreams. Along the way, they meet Anna Kobayashi, a talented singer who initially struggles with stage fright but eventually joins the group, solidifying their trio.

The narrative explores the challenges and triumphs of balancing school life, personal growth, and the demands of being aspiring idols. Each episode often features the girls preparing for performances, collaborating with other Pri☆Chan users, and overcoming obstacles such as self-doubt, technical difficulties, and rivalries. The series also introduces a variety of supporting characters, including other idol groups like "Sweet Diva" and "Solami♡Smile," who serve as both competitors and sources of inspiration.

As the story progresses, the girls participate in various events and competitions hosted on Pri☆Chan, such as the "Pri☆Chan Grand Prix," which tests their creativity, teamwork, and ability to connect with their audience. The series emphasizes themes of friendship, perseverance, and the importance of staying true to oneself while pursuing ambitious goals. Through their journey, Mirai, Emo, and Anna not only grow as performers but also deepen their bond as friends, showcasing the transformative power of shared dreams and hard work.