Mahō Tsukai Kurohime

The black-clad Kurohime was once a powerful, beautiful "magic gunner", wielding the greatest ability and power in the world...but she tried to defy the gods with this power, and ended up cursed with the weak, useless body of a child. Today, she roams the land, looking for a way to break her curse. After a run-in with a gang of bandits led by a man named Onimaru, she makes a narrow escape and runs into a mysterious fairy named Renfa, who agrees to break the curse in exchange for helping her. Mahō...