doesnt sound bad, have a plot in mind?
I've got a few ideas. I know MnF isn't exactly known for having full blown stories, but I personally enjoy them.
I think the main idea would be "you enter the MnF world in an attempt to save it".
One of the ideas is "All Meet and Fuck games have been censored, and all the characters forgot what sex is, and you have to enter the world to remind them all."
If that's what I go with, the gameplay would be like a sandbox dating sim, where you explore areas and talk with the characters, since you'll be playing as a MnF fan, you remember their original games, so you try to recreate the scenarios from their games (along with plenty of original scenes, obviously).
The second idea, is more of a simple "the MnF world is under attack, and you have to save it". That one would play more like an rpg, where you meet the mnf characters, and they join your party and help out in dungeons. That would be more of a linear story, although you can still talk and have fun times with the women in between dungeons of course.
I'm honestly split on which one to go for, so feel free to let me know if you prefer one over the other, or I could even combine both.
A key thing I'd want to emphasise is the range of characters from MnF history interacting with each other, and include scenes that could only really happen in a fanmade crossover.
I'm open to any thoughts and feedback!