Utawarerumono

An injured, amnesiac man with a mysterious mask is found abandoned in the forest. After he is nurtured back to health, he is given the name Hakuoro. After saving the village from a wrathful deity, he adopts the role of the village's leader. Although wishing to live in peace, fate eventually forces him down the path of war and battle...
Hakuoro has lost his memory after succumbing to serious injuries; but thanks to a elderly woman and her granddaughter Eruruu, he is nursed back to health. His face is covered by a strange irremovable mask and he occasionally sees beastly visions. Eruruu now cares for him as he becomes accustomed to the village and its inhabitants who all bear strange ears (the women have tails too). Though these people venerate the forces of nature, desecration of an alter forces them to take drastic measures to preserve their lives from the wrath of Mutikapa-sama, guardian of the forest.