“The truth is shrouded in darkness…no, it’s buried in a grave.” -Humpnie Humbert
With Kami no Inai Nichiyoubi past its introductory arc and fake-out ending, very little has been actually revealed about the strange world in which Ai wanders, and even more mysterious is her role as a gravekeeper. We have already seen a few gravekeepers in action first hand, but how they are designated and where they come from are still unexplained. If there’s one thing that’s certain, it’s that Ai is just as uninformed as the viewer. All that she and we seem to know is that the type of burial shown here is a more natural burial, lacking embalmment and the concrete base of which modern burials consist. Graves are dug by hand and shovel, and bodies placed in lined, wooden coffins with nothing but the clothes on their backs.
(Spoiler in red font)
Anime B&B 