Devil & Devil

Sinopsis

Angels and devils are in a perpetual battle above Earth. During their 101st confrontation, the devil Sword and the angel Ios sustain severe injuries, causing them to fall to Earth. To survive, Sword possesses the body of an unconscious, beaten teenage boy named Souma. Unbeknownst to Sword, Ios also possesses a human body to survive, specifically that of Souma's twin brother, Kanna. The twins' personalities are vastly different, with Souma being a nerd and Kanna being violent. Both Sword and Ios find themselves unable to fully utilize their powers in their new, weaker human forms.