In a medieval fantasy world with a WW2 system

James was just an everyday office worker stuck in the rut of a 9 to 5 job where all he did was work to survive. Now given a chance by a mysterious being and armed with a system that has the potential to shape his new world in any way he wants he has realized that he might actually have a chance to live with a little excitement in his life. It didn't take him long to realize that he might have taken on more than he can manage.