Marrying the Villainess Noblewoman at the Start?!

Lind is transported into the world of the last game he played before his death—and inexplicably chosen by the royal family, no less. Just like that, he becomes the tragic fiancé who, in the game, gets dragged into a rebellion by the villainess noblewoman.
To avoid the doomed ending of the original story, Lind must struggle to survive in this increasingly magical world.
Years later, fringe races begin to whisper among themselves:
“Why do barbarian hordes keep respawning on the empire’s borders?”