Bouken Ou Beet

During a time of darkness, a boy named Beet aspires to join the elite Zenon Squad, a powerful group of Vandel Busters who hunt devils. Beet's mistake leads to the squad's defeat by the devil Beltose, forcing the five busters to transfer their remaining power into their weapons, the Saiga, before dying. They leave their weapons with Beet. Many years later, Beet becomes a Vandel Buster and embarks on a journey to fulfill the Zenon Squad's goal of ending the dark era.