Dunno...but it's kinda funny, and kinda the only "Horror" Manga/Anime that I can really remember, so it somehow ended up on this list. It's funny, you should read it :'D
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
Ibitsu