Yanor Kingdom, Royal City of Roland.
They say that being the boss in the Royal City means you're the real deal; all you need to do every day besides eating is sleeping, nothing else!
Places like Bed City, which are just backwater areas, aren't even worthy of their notice!
Ever since Yanor I established the Kingdom amidst chaotic times, four hundred years have passed.
War, civil strife, meddling in-laws seizing power, untimely deaths... due to various factors, the current King Ainz III's bloodline has long been impure and muddied. Perhaps the authentic royal bloodline has already been lost, but bloodline is just a name; real power is what truly matters.
Ainz III is quite fortunate, his father subdued the surrounding nations, leaving him a strong, orderly country. The four border Dukes were all exemplars of loyalty and patriotism, so he had few worries and lived happily every day.
But it seemed the Gods wanted this lucky King to taste some distress.