MonsterEyeGames may I suggest an idea for the harem problem
you said that you can't render too many characters and I get that I worked for a while on Daz and that's true it takes a lot of time to render a scene if you don't have a good PC and even if you have a good PC it still takes time to render so here is what I thought
You can follow an example of the game Treasure of Nadia the dev have a harem route but the there are many characters so what I notice from his scenes is that he focus on showing a sex animation with 3 out of the 9 girls in the scene and then the MC moves to other 2 or 3 girls and shows another sex animation so what I'm saying is that you can render 2 characters at a time so that way you can split the time rendering them for I don't know if I was confusing or not but I think you can pull this off
Now I'm not mad or anything I think that the game is great it's not perfect but I did enjoy it and I think that it's great that you continue to work on the game to add things even after the game is completed, I'm looking foward to your next game