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!
and now have the right to pick a
demon to rule in Lucifer's stead?!
y quien puede elegir al 
que sustituirá a Lucifer?
y el único que puede escoger al 
sustituto de Lucifer?
e tem o poder de escolher um demônio
 para atuar no lugar do Lúcifer?!