The Frontier Lord Begins with Zero Subjects: Tales of Blue Dias and the Beastkin Alna

"The Frontier Lord with a Population of Zero" is a Japanese light novel written by Furo. It began serialization on the novel posting website "Shōsetsuka ni Narō" on January 20, 2018, and was published as a book by Earth Star Entertainment in October of the same year. As a media mix, a manga adaptation illustrated by Yunbo, titled "The Frontier Lord with a Population of Zero ~Dias of Blue and the Azure-Horned Maiden~," is serialized on the Earth Star-operated manga distribution site "Comic Earth

Source: Wikipedia