Non-forced sissification. I would pay big money for a game like that. You play the main chracter and transform him the way you want without the dev forcing, rape, supernatural things, hypnosis, etc.
I rarely see anyone talking about Good Girl Gone Bad by Eva Kiss. I really like this game, I've played it several times. Their other game (Our Red String) is very good too.
This game is great, I've been playing it since the first release. I think the only downside is that Stephanie's route is too short, she needs more attention from the dev. Stepthanie and Ellie best girls <3