Mamono Overlord saga [Makai Senki DisGaea X Monster girl encyclopedia]

In a lustful world where the monsters are now in the form of seductive women, taking the place of that world's monsters, taking men and forcing them to be their slaves, heroes are sent with little progress by the church of the chief god and various groups that opposed the current demon lord.... But that soon gets turned on it's heard when a young witch gets the chance to summon an Overlord form another netherworld, and please don't tell him that this place if utterly infested with what he hates the most...