Welcome! To the Forest of Lewd Elves(2018)

Welcome! To the Forest of Lewd Elves is an anime series set in Alfheim, a world inhabited entirely by elves. When the World Shrine—the source of all magical power—begins to fade, the elven race faces extinction. According to prophecy, only a man from another world can save them. When a human hero is transported to Alfheim, he becomes central to the elves' desperate bid for survival. The series blends fantasy worldbuilding with the arrival of an outsider thrust into a civilization on the brink of collapse.