The Outsider Of War (Male Reader X Fire Emblem: Sacred Stones)

This is the story of (Y/N) (L/N), a normal boy who lived on earth, When suddenly you are teleporting from nowhere in another world, now you are in Magvel in the year 803, when you thought that your situation could not be worse, you have started an unexpected war for the nations, you can survive this other world or die in the war?
I do not own Fire Emblem Sacred Stones, only the fanfiction