Tensei Ryoushu no Yuuryou Kaitaku: Zense no Kioku wo Ikashite White ni Tsutometara, Yuunou na Jinzai ga Atsumari Sugimashita

When I woke up after collapsing from overwork working for a black company, I had been reborn as the son of a minor feudal lord in a different world. Our lands were attacked by monsters, I lost my new parents, and the people fleed... In order to survive, I must gather a talented elite so this land can thrive by employing my knowledge from my past life as a overworked white-collar worker! A story of managing a fiefdom in another world starting from zero citizens!

(Source: Manga UP! Global)