Эпизод 1

In medias res, Ai Astin confronts a mysterious stranger in her town who seemingly kills all the townsfolk. Unwilling to listen to the man's reasoning, Ai furiously attacks him, but he easily overpowers her. A flashback shows the 7-year old Ai, being made the village grave-keeper upon her mother's death and had been carrying out her duty ever since, explaining that grave-keepers are the only ones that can help the dead rest in peace after God's abandonment.