Umezu Kazuo-sensei no... Kowai Manga Tokushuu Anime Details and Episodes Published as a supplemental volume for the manga magazine Nakayoshi, this includes three alternative versions of previously published stories by Kazuo… Series info Watch free DetailsFormatMangaStatusFinishedSourceMangaCountryJapan GenresHorrorSupernatural RelatedMama ga Kowai (Sequel)