Been lurking here since the thread was made. Thank you for it. Great resource.
I don't think it's been brought up before so I can add
Brothel King as a suggestion. Similar to
Masters of Raana, you can train girls in a way that maintains their virginity. You have to randomly find them for sale with that trait.
Girls have to be added to the game via packs (
Girl Pack Thread), and if you're handy enough with editing some of the girl profile files you can guarantee a virginity trait if you like. Or keep rolling brothel girls until you get one.
Might be an unconventional suggestion but I enjoy the game played this way. You do not have to whore the girls out despite the name "Brothel King". They can work normal jobs. You can also dictate what they're allowed to do so you could have a whole establishment of virgin whores that aren't allowed to sell vaginal sex, if that's what you're into. There's a trait tree for the girls dedicated to just that idea.
The game is slow to receive updates (you can find the experimental release of 0.3 in a link in the thread if you like) but it's got a decent flow of content already, and a fair amount of community support.
I'd also like to ask for suggestions for games that just have a singular character who is anal only. It doesn't have to be the whole game that's focused on the idea. Like
Slave Lord Realms of Bondage has a character that you can train in a way that preserves their virginity. It's not the whole game but a sub-section and a bit limited. (I didn't find the character attractive, unfortunately, so it was a letdown for me, ymmv). I'd play an entire VN if there's one good character with this fetish. It's difficult enough to find already, you know?