In the fictional city of Mitakihara, Japan, you’re a middle school student and your best friend, Sayaka Miki, encounter a small, cat-like creature named Kyubey. It offers a contract in which a girl may have any wish granted in exchange for obtaining magical powers and being tasked with fighting witches. Meanwhile, a transfer student and mysterious magical girl named Homura Akemi tries to stop you from making the contract with Kyubey. You and Sayaka then meet Mami Tomoe, an upperclassman at the same school who is also a magical girl. Noticing their indecisiveness on whether to become a magical girl, Mami offers to take you and Sayaka along on her witch hunts so they may learn of the responsibilities of being a magical girl.