I've been wondering about this for a while now. With how perverted some anime and manga are without ever crossing into pornographic content territory, were there ever any anime or manga with official pornographic media? Example: a little spinoff series of sorts of a regular anime/manga, with one or two episodes focusing on characters bumping uglies mostly. Bonus points if those "interactions" are officially canon.
Obviously, I'm not talking about something like Dragon Ball or Pokémon. That's just weird. I'm talking about anime and manga that are already adult oriented, which already have some light sexual elements or sexual overtones, where it would make sense for official pornographic content to exist.
I wouldn't be surprised if some companies already tried to squeeze some extra bucks from the more fanatic and perverted parts of the fanbase, while those uninterested in the content never have to see it if they don't want to.
I'm specifically talking about series(es?) that started out relatively non-perverted and whose main source stayed relatively tame - no intercourse is ever shown directly, but it could be implied. VNs that had perverted elements and were turned into anime/manga later do not count, but feel free to give some examples if you want to.