It's been years since the coup d'etat on Zoble, and the demons have managed to remain hidden for that entire time, as the Idaten fruitlessly search for them. But when Miku springs her plan to rendezvous with the Demon Lord, all that is about to change.
So the real reason I think the 
pure-blooded demon population
لذا باعتقادي السّبب الحقيقيّ وراء 
ازدهار عدد الشّياطين غير المُهجّنة
Ich vermute, dass die hohe Geburtenrate
reiner Dämonen an der Ernährung liegt.
El motivo tras tantos demonios puros
El motivo tras tantos demonios puros
La prolifération de ces démons purs
est due à leur alimentation.
Ma il vero motivo per cui la popolazione dei demoni
purosangue cresce a questo ritmo è la dieta.
Mas o motivo de demônios puros
estarem aumentando sua população
Скорее всего, истинные демоны
так бурно плодятся из-за питания.