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Puella Magi Madoka Magica is a 2011 Japanese anime television series created by Magica Quartet and animated by Shaft.
Ref: https://tvtropes.org/pmwiki/pmwiki.php/Anime/PuellaMagiMadokaMagica
In the fictional city of Mitakihara, Japan, a middle school student named Madoka Kaname and her 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 Madoka from making the contract with Kyubey. Madoka 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 Madoka and Sayaka along on her witch hunts so they may learn of the responsibilities that come with being a magical girl.
However, after witnessing Mami's death at the hands of a witch, Madoka realizes the life of a magical girl is filled with suffering and pain. This is further enforced by the appearance of Kyoko Sakura, a veteran magical girl whose wish unintentionally caused the death of her family. Madoka also discovers magical girls give up their souls to form Soul Gems, the source of their magic and that when Soul Gems become too tainted with despair, magical girls are converted into witches.
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