Manga by author Shinta Harekawa - Status ongoing

In the mountains above Japan, Mamoru Yamaemori spends his days tending to his family shrine, fighting Tengumonsters who feast on human fleshand, making sure his two younger brothers will never have to pick up his mantle. Unable to escape the life forced upon him by his parents and a dark ritual involving Tengu blood, all he knows is that his existence is a curse: he is destined to die young in the service of others. But to fight monsters, Mamoru must dance that line between loving older brother and mindless beast or else he risks becoming that which he is sworn to destroy.