Overlord, Vol. 13 (light novel) by Kugane Maruyama
The Sacred Kingdom is surrounded on all sides. As the army of feralcreatures closes in, the country's strongest paladin Remedios leads herexhausted troops in a valiant defense. It will not be enough to save them. Theironly chance of survival is to place all their bets on the King of Darkness-AinzOoal Gown!