The table of contents lists all the stories as originally appearing in Halloween (magazine) a monthly manga magazine produced by Asahi Sonorama (朝日ソノラマ, Asahi Sonorama?), a Japanese manga, book, and magazine publishing company.
Sonorama 2013, or Sonorama Ribera 2013, was scheduled to be the XVI edition of the Sonorama Festival and took place at the city of Aranda de Duero in Castile and León (Spain) in mid-August.