Puella Magi Rin Magica

All Rin ever wanted was a friend who cared for her and wouldn't leave her. Kyubey is all to happy to grant her wish, in exchange for Rin using the powers granted to her to fight Witches. But Rin quickly learns that her wish is not all that she thought it'd be, and neither is being a Magical Girl. (Demons still exist, but now there's also Magical Girls)