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!
I'm much more worthy of the throne than you!
¡Quien es digno de ocupar el 
trono de sucesor soy yo, no tú!
¡El único digno de ocupar el trono 
de sucesor soy yo, no tú!
Sou muito mais digno
 do trono que você!