The Frontier Lord Begins with Zero Subjects Episode 4

When Dias returns home after decades of fighting, he is hailed a hero and rewarded with an entire domain. But the twist is that the domain is nothing but an empty field where not even a single person lives! Dias only knows how to fly, so he's worried about how he'll survive and populate this empty field. But then he meets a horned lark named Alna, who shows him just how special this empty field really is!