債務魔法少女クレカリボカ, Debt magical girl creca reovca

Sasara Sawajiri, a third-year high school student, signs a contract with a mysterious creature named "Kure-Kure" in order to cure her precious younger sister's illness, becoming a magical girl who defeats monsters controlled by the desire to harm others. While Sasara spends her days fighting these monsters as a magical girl, there is a massive catch to that contract...