After transmigrating to another world, Yang Hao, who understood the way of [efficiency], won a princess's favor with the [White Witch's Eye] bestowed on him by an unknown being. A few years later, he married into the royal family and became the kingdom's true ruler alongside his beloved wife.
His wife was an empress obsessed with lock-making, and his kingdom was a pathetic little country with a population of only tens of thousands and an army that couldn't even muster five hundred soldiers.
Still, Yang Hao, who did almost all the work, remained diligent and dedicated. He strove to improve the kingdom and change his people's daily fare from thin wheat porridge to baguettes fit for taking to war.
But...
"Lou Yi, this can't go on!"
Yang Hao knew he had already pushed the potential of the [Frankish] Kingdom to its limit.
Worse still, the crucial grain trade with the great power next door was about to be suspended because of a drought in their country...
To help his and his wife's country survive this life-or-death crisis, Yang Hao decided to...
Rent himself out to the neighboring great power's princess!
But seriously, why are all the rulers of this world's nations queens?
Reverse NTR warning = W