Based off of the Maken X video game for the Dreamcast.
 
Due to an accident at her father's scientific research institute, Kay, an ordinary teenager, is forced to become the owner of "Machina," a strange shaped sword with the power to capture human souls. Kay now fights against freakish fiends in a world of "Images," a horrible place formed by the each character's imagination. In this world of "Images," values are confused: enemies become friends, good becomes evil, and vice-versa. Kay must continue her battle in a place called "5 Minutes into the Future." 
(Source: Anime News Network)

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