The Frontier Lord Begins with Zero Subjects

After the war ends, hero Dias receives a plot of land as his reward—but it turns out to be a desolate frontier, empty of people, villages, or any trace of civilization. Faced with nothing but endless grassland, he decides to start from scratch and build his own domain. Everything changes when he meets Alna, a mysterious girl with a blue horn. Suddenly, his isolated new beginning begins to stir with life.