So I had this idea for a dating sim horror game featuring weight gain.
You are dating a girl you met on a blind date. She is a fit, former model/fitness junkie who has begun to desire a change of pace. You jokingly suggest that she get fat as you’re into larger ladies & she decides to take your advice seriously. Now on a journey to get as fat as she can you encounter the normal stigmas of society trying to dissuade this. However, as time goes on, the cruel stigmas become more malevolent, to the point where her weight gain becomes almost essential for her survival.
That’s the basic idea so far. Feel free to use it & tweak it as you see fit.