You could make it a sandbox game with no grind though. Keep the map for the important areas, and just give the players the choice of which task they want to take on next. Who they want to go see and persue, talk to, repeatable sex scenes, etc. That's always my favorite kind of game. There doesn't need to be any challenge involved or have choices that change the outcome, as long as I can pick which thing that I want to do next.
When its just a one-way kinetic novel, it honestly gets boring for me, even when the content is all the same, and I sometimes have a hard time remembering who some of the characters even are, given that with porn games I'm bouncing from one to another as updates are added.