Why do you not ask on gay games for such characters? It might be easier to include a character with tits there, than to include a character with a dick elsewhere. Especially since you are after the mc getting screwed by the futa.
You beg for futa on so many games that have no inkling of going in that direction. It is irritating.
And there is not even a lack of futa games. Try this, it's good. And there are futa tags, even though not all use them. Use a site search on itch. https://duckduckgo.com/?q=site%3Aitch.io+futa&ia=web