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!
If he's trying to get in the good
graces of a prefect, then...
Si se trata de que te dé consejos 
para ser alumno supervisor...
Si lo que quieres son consejos para
convertirte en alumno supervisor...
Se ele quiser a boa impressão
 de um monitor, sugiro—