Makeruna! Makendou

Synopsis

Makenko was an ordinary boy until the brain monster Dr. Mud kidnapped him and turned him into a cyborg capable of destroying both the monster world and the human world. On his path of revenge, he is unexpectedly joined by Makendo, a monster hunter who would rather not be one, and her little sister Hikari, who couldn't be more eager to help. Dastardly demons and wacky monsters fill their journey as the trio fights the bad guys, kicks some monster butt, and works to get Makenko's body back.