Thanks!
There's a kind of a gallery that you unlock if you interact with a specific "hidden" pedestal. Nothing fancy though. It just allows you to replay all the NSFW scenes between enemies and the boss dragon.
The particular pedestal is the white one, standing alone at the end of a bunch of narrow ledges that talks about "voices" and "the main menu." You've got to exhaust the 4 or so lines of dialogue from it which after you should be able to see a new extras section in the game's main menu.
At that point you can just close and relaunch the game and it should be there.