Will we ever see an NC-17 movie with mature storytelling?
Because I can't think of any existing ones. When a filmmaker wants to address adult-oriented or controversial subject matter, the R-rating nearly always proves perfectly sufficient. When you progress beyond that, all you'll generally get out of it is more explicit sexual/gory/whatever imagery, which not only almost never improves what you'd get out of an R-rated cut (and stands a good chance of rendering it less effective), but lends itself to films that plug those elements in there in defiance of what good storytelling would dictate.
Same goes for AO games. Hentai visual novels that also have good stories can certainly exist, but you'd be hard pressed to come up with a way to make all the explicit sex scenes more meaningful than they'd be if you simply scaled back the pornography and put it into an M-rated game (controversial though themes and even cut-down imagery of sexuality might prove in a mainstream M-rated game; it's not as though dealing with such subject matter would automatically land the game with an AO-rating).
Because I can't think of any existing ones. When a filmmaker wants to address adult-oriented or controversial subject matter, the R-rating nearly always proves perfectly sufficient. When you progress beyond that, all you'll generally get out of it is more explicit sexual/gory/whatever imagery, which not only almost never improves what you'd get out of an R-rated cut (and stands a good chance of rendering it less effective), but lends itself to films that plug those elements in there in defiance of what good storytelling would dictate.
Same goes for AO games. Hentai visual novels that also have good stories can certainly exist, but you'd be hard pressed to come up with a way to make all the explicit sex scenes more meaningful than they'd be if you simply scaled back the pornography and put it into an M-rated game (controversial though themes and even cut-down imagery of sexuality might prove in a mainstream M-rated game; it's not as though dealing with such subject matter would automatically land the game with an AO-rating).