Are you still looking for someone to team with? I've got a good bit of experience with Renpy, with a particular interest in programming custom UIs, like for this fangame I did all the UI work for https://lssalvationsquad.itch.io/loves-truck-final-stop
My skills are in renpy/python and writing. I don't mind overmuch what the actual game is about, though I'm very happy to contribute to writing/planning if that's what you're looking for too. NSFW is a-ok.