Partially the context, and partially how generic it and the scenes/girls are.
If I start the game and see the same sexdoll-looking women I see every time, or the same identical scene/story beat I've seen a hundred times with no attempt at variance, I inwardly sigh.
A bunch of games that I modded to be NSFW, from most bethsoft games to sims 3, Resident Evil 4, probably more. If there was an option to mod NSFW into it, I probably looked for it.
Also Stardew, and I started "modding" it myself by rewriting dialogue and events, learning how to add in new...
What games is this similar too? And what variety of girls are there?
Trying to get a sense of what the main appeal is before committing to a big download
The context of the situations created is the important part of the plot, so when I say plot, I don't want it to be misinterpreted as meaning I want to read the amateur crime-thriller or sci fi plot of the game's creator.