Make the Demon Race Great Again

This is the story of a Demon King in a fantasy world of swords and magic who can't stop dreaming of building factories and making giant robots. ~(￣▽￣)~

"The goblins around here don't steal grain or women. But ever since they built a factory upriver, everything's gone wrong. They belch foul-smelling fumes all day and dump filthy wastewater into the river. More people in the village are getting sick with coughs. The crops irrigated with river water have died, too. So please, drive them away!"