I just wanna say, I truly hope that we do get to have a bonafide romance by the end of the game.
When I first started playing the game (well, when it was first posted on here anyway), the 'romance' tag was what intrigued and drew me to the game alongside the concept; I liked the idea of a bunch of people going into a house and having largely shallow sex and no expectations (or possibly wants) for anything other than winning, only for our MC to find that feelings start to develop between them and one of the other contestants. I loved how 'at odds' that was with the aim, while at the same time being perfectly natural within a shared house over time, between people who have good sexual chemistry and good communication; connecting on a more personal level.
I also loved the additional drama 'genuine feelings' add because it goes against the interests of them entering in the first place: There can only be one winner, and so the feelings they develop becomes a big barrier to them being able to effectively compete for themselves; a conflict of interest. I loved the idea of what that could add in terms of a deeper storyline and the drama and psychology of it, beyond just random porn scenes with little depth between one episode to the next when we switch to some other random partner. There's a sort of emptiness in 'just porn'.
It's genuinely cool to think how such a building relationship, kept secret from the other contestants, could effect how they play the game. Obviously wanting to keep their romantic interest in the game alongside them as long as possible, but without making their deeper connection so obvious that people would see them as an easy choice to eliminate (due to their chemistry in scenes together resulting in their work consistently rating among the top for every challenge).
The MC might deliberately try to arrange to be in scenes with the person they're "after", either directly (by winning challenges) or indirectly, through influencing those who choose couples, or a person (maybe multiple) could try to arrange to be in a scene with MC if they like them. To this end, one or both of them might reach a point were they have a falling out because they realise this makes them a target. They didn't join the competition to fall in love, but in the end they're drawn to each other regardless and (depending what the player chooses to do), may choose love over winning, or see if they can find a way to win together.
And I think it would be cool if there was a potential ending where the MC AND the person they're in love with/now in a relationship with, are joint winners and become a well-known duo in the porn industry - famously working together as a couple or in threesomes, etc because there chemistry/passion is off-the-charts when they're filmed together.
As for characters where this could be possible, it's not like you would have to make all of them romanceable (nor would that make sense due to their certain circumstances), but to have 2-3 of each gender potentially romanceable would be fantastic.
And since we're on that topic, I gotta put a vote in for one of the male options being one of the "straight guys" Matt or Damon. I say Matt cos I've loved Matt and MC since the start, and that hasn't changed, though It's been disappointing not to have more personal content with Matt since the sauna moment. I really love Hugo for his passion and personality, and the fact he's cute af (especially the cute guy used in his porn scenes). Yousef seems to be pretty popular too.
As a final note, I don't really consider "romantic" porn scenes -- scenes where the characters are just putting on an act and don't actually feel anything -- as 'romance' in a game like this, just acting. Fake. I truly hope we do get some ACTUAL romance to empathise with; there's not enough of it in adult games anymore and if written well it really adds something.
Anyway, just my opinion on the matter.