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
@USBhump my original thought was a vaguely anime-esque fantasy setting maybe with one of those "woo someone to politically marry within this time limit" or something. honestly I've given more thought to the characters and their workings and relationships would be more immediate than an overarching plot. the two that are already dating were the punk tsundere that starts off hating you and some flavor of nicer character. it's still very barebones.