basically a futa/male romance? tough luck man, i'm tryna look for the same stuff and its far and few in between sadly
There's plenty out there Futa/male romance out there, but not a lot where the male is up for anal, and the ones that do tend veer towards domination of the MC.
But there are games out there that feature Futa on Male content that don't go in that direction. Midlife Crises and Fetish Locator both have one futa/trans character with that dynamic in the relationship, but the content is sparse.
In Frozen Past (which I've just discovered) it seems to be the basis for the main relationship in the game, though once again content for it seems to release slowly.
Seeds of Chaos has some but that game likes to play with domination and NTR too much for me, that and it's pretty focused on being a game first so I find it tedious to play.
There's Tales of Adorevia, I think it's called, has a number of Futa on Male scenes that just seem to be about mutual pleasure, but it's an RPGM game and I can't be bothered with that when I'm tryina beat off.
Lunar's Chosen is my go to for this content.
I do find it frustrating though, seeing release after release of futadom sandbox and rpgm games. When I've got like 5 or 6 titles to choose from and I've played them all. But I guess it's not a big demographic or something.