Hiroki Endo's Tanpenshu (Japanese: 遠藤浩輝短編集, Hepburn: Endō Hiroki Tanpenshū, transl.

"Hiroki Endo's Short Stories Collection") is a collection of various short manga series by Hiroki Endo spanning two tankōbon volumes.

In the play in "For Those of Us Who Don't Believe in God", the story of American serial killer Henry Lee Lucas is recounted.

It is evident that Hiroki Endo put effort into his research of the man, as a short bibliography is listed within the manga itself.

[1] It's implied that Lucas was the basis for the killer character within the play.