Isekai'd As A Lord Of The Manor
D34/100Web serial by Kuzunalis
William died chasing a promotion. He woke up as Alden, eldest son of a Baron in a medieval world where monsters descend from the north every winter — and everyone relies on a powerful Duke's fortress city for shelter. Until now: for the first time in living memory, the Duke is charging an exorbitant fee to enter, and Alden's dirt-poor village can't pay. A former London engineer, Alden carries modern knowledge into a world of parchment and swords. With elves, dwarves, and orcs as fellow survivors rather than enemies, and fate pushing responsibility onto him far too soon, he must do what has never been done before: transform an overlooked frontier village into something that can endure the impossible winter. If the world won't save them, he will.