Kakuriyo Sennichi Hina summary:

It was summer in the 19th year of Meiji.A child demon, Torasuke, and his partner, Ushimatsu, were collecting souls of humans whose lifespan had expired.One day, a human named Soma, who was supposed to be invisible to the humans, spoke to them. Torasuke has never been involved with people in this world, but when Soma asks him to exterminate a ghost, what happens?This is a touching and strange tale of life in the "hidden world" and the "present world".