Manga The Population Of The Frontier Owner Starts With 0. "Dias The Blue" And A Blue Horned Girl.
Ryoumin 0-nin Start no Henkyou Ryoushusama
Ryomin Zeronin Sutaato no Henkyou Ryoushu-sama
Genre: Fantasy , Adventure , Drama , Slice of Life , Seinen
The protagonist's parents asked him to help other people, which he successfully copes with on the battlefield. Throughout his long military career, he became known as a hero-savior who helped a huge number of warriors. However, in the end, he receives a huge territory from the king, and decides to equip his life here. He finds a girl and becomes a lord.