The Faraway Paladin: The Archer of Beast Woods by Kanata Yanagino

Will has come of age. As a sorcerer, warrior, and priest of Gracefeel, he departs the city and temple where he was raised on a journey to the north. It's been two hundred years since the battle against the High King of the Eternals. Are there any humans left in this world and, if there are, will they accept Will with open arms, or see him as an enemy?