the only game ideas I've ever had are 1) my own overdone Yume Nikki game and 2) a dating sim where it's impossible to get a good ending if you follow the typical dating game tropes instead of interacting like a reasonable human being

two of the love interests are already in a relationship and if you break them up so that you can get with one of them, one is only willing to date you because they're heartbroken and need a rebound and the other murders you