Ryoumin 0-nin Start no Henkyou Ryoushu-sama  

The Frontier Lord Begins with Zero Subjects: The Blue-Horned Maiden, The Frontier Lord Begins with Zero Subjects: Tales of Blue Dias and the Onikin Alna, 領民0人スタートの辺境領主様

After many years of conflict, Dias arrives at his homeland. He is greeted as a hero and immediately receives his own kingdom. However, upon his arrival, he discovers that his new domain is mostly barren land with no inhabitants. Feeling lost and unsure of how to proceed, Dias struggles to find a way to turn his empty land into a prosperous kingdom. Fortunately for him, Alna, a young girl with horns, will soon demonstrate that there is more to the plains than meets the eye.