Dantalion, one of the many candidates for Lucifer's throne, decides to live in the human world an attend William's school and lobby the young noble to choose him as Hell's ruler, but he gets more than he bargained for when William's friend Isaac accidentally summons one of his competitors!
Go ahead and fight, just don't involve me!
¡Si desean pelear, que lo hagan 
solos! ¡Que no me involucren!
¡Si quieren pelearse, que lo hagan 
solitos! ¡No quiero tener nada que ver!
Vá em frente e lute, só não me envolva!