Local heroines, who are superhero characters representing towns and boosting their popularity through stage shows, gained immense popularity years ago. The most renowned among them, Kamidaio, was due to perform in the small town of Hinano, much to the excitement of Yuzu, Mikan Kise's younger sister. However, Mikan finds out that the show has been canceled, leaving Yuzu in despair. She takes up the challenge of making sure her sister gets to watch the show and seeks the help of her classmate, An Akagi, an ardent fan of local heroines. Mikan and An don homemade costumes and present their own Kamidaio performance, which is received with tremendous enthusiasm by the young audience, despite its low budget. The student council president, Misaki Shirogane, records the show and shares it online, hoping to create a buzz around it. Misaki hails from a family of politicians and is determined to revitalize Hinano. Impressed by their act, she invites Mikan and An to become the official local heroines of their town. As the group strives to enhance their performances, they seek assistance from varied and intriguing individuals.