The story follows a young woman who, after her favorite idol group suddenly announces its disbandment, suffers a fatal accident. As she loses consciousness, she glimpses a strange vision. Awakening in another world where humans and demons live together, she finds herself reincarnated as Yuria, the daughter of a family that runs a dilapidated theater buried in debt. The situation is dire: the theater will go bankrupt, and Yuria herself risks being sold into slavery to cover the debt. Her hope returns when a beastman named Cain appears, bearing an uncanny resemblance to the idol she adored in her previous life. Moved by his offer to do any work to help save the theater, Yuria decides to produce a demon idol group. She gathers a mismatched cast of non-human members including a vampire, an elf, a slime, and multiple beastmen, each with their own quirks and talents. Together they aim to earn enough money through idol performances to clear the theater's debt and avoid Yuria's enslavement. However, powerful rival idol groups emerge, forcing Yuria to constantly adapt her production strategies and keep her group ahead in the competitive demon-idol world. The narrative centers on Yuria's journey from a despairing reincarnated girl to a determined producer, the bonds she forms with her demon idols, and the group's uphill battle against both financial ruin and fierce competition.