This anime focuses on a school known as Shibusen, here Weapon Meisters and their Weapons train. Weapons have a human form/personality as well as their weapon form. The goal of the school is to eliminate evil human souls, they do this to eliminate the risk of one of these souls turning into the Demon God. Once a Demon God is born from a corrupt human soul they will throw the world into chaos and attempt to destroy everything. In order for a weapon to become powerful it must devour 99 evil souls as well as the soul of a witch.
(At the time of this review 16 episodes are released and the series is currently unlicensed in the U.S. as an anime.)