Henkyou Ryoushu wa Daikizoku ni Nariagaru! Cheat Chishiki de Nobinobi Ryouchi Keiei shimasu
辺境領主は大貴族に成り上がる！チート知識でのびのび領地経営します / The Frontier Lord Climbs the Ranks to Great Nobility!
Ongoing
After an invasion by a neighboring country kills his father, Ax Freinhaim inherits a frontier viscounty. A vastly larger imperial army is closing in, but Ax remains composed, drawing on memories of his previous life on Earth. With knowledge from that life, quick thinking, and the help of dependable allies, Ax succeeds in repelling the imperial forces. Yet there is little time to rest: he must now face the challenge of rebuilding his territory.