The end of terminus enters its final days. Iruma safely finishes his homework and is invited by Sullivan to go to Magical Street along with Opera. They browse around picking up things Iruma will need for his new school term. Iruma happens to overhear some demons talking and then asks Sullivan about the Demon King, since he is one of the most qualified individuals to become Demon King. What exactly does it mean to be the Demon King, the most powerful being in the netherworld?
So the Demon King is in charge 
of most of the netherworld.
.إذًا ملك الشّياطين مسؤول عن معظم الجحيم
Así que el Rey Demonio se encarga
de casi todo el inframundo.
Así que el Rey Demonio se encarga
de casi todo el inframundo.
En résumé, le Roi-démon contrôle
presque tout en enfer.
Quindi il Re dei Demoni è a capo
 di gran parte dell'Altro Mondo.
Então quer dizer que o Demônio Rei é
encarregado de quase todo o mundo inferior.
Получается, что Князь отвечает
почти за весь этот мир?