Luxee always wanted a transwoman in a game, at least as far back as Parental Love. I think this game was a chance to do that, and they're clearly an important character to it. Yet even on Luxee's official website Nea is just listed as one of several potential love interests. The game itself starts with the MC in the future, talking about their girlfriend, but obviously they aren't specific on who it is. It could be Nea. It could theoretically be any of the love interests.
At the same time, multiple love interests have their progression tied to events with Nea. Luxee has been focusing on Nea probably more than any other character. Although then again, they did kill them off to a sizable portion of the player base just because the MC didn't want to have sex with them. There's the incest aspect to the game that hasn't been explored too much, but is presumably somewhat central to it given there's three family members as love interests, and some master plan by the mother. And then there's also the loli part that Luxee goes to the effort of making extra content for, with multiple characters that qualify for that label.
It feels kind of like Luxee doesn't know what they want from the game. Is it about Nea, an incest central game, a loli game, or just another "gotta fuck them all" sex game? Honestly, the entire Nea thing would have played out better as its own visual novel. It's a deeper story than the rest of the game, so it feels kind of weird when it switches from that to random sex with the woman at school, and I'm sure it would continue to be strange as things progress with Nea but the MC is still chasing after every other girl. That holds true for a lot of games though where there's one character that's the love interest and others that are just there for sex. Maybe some of the other love interests will turn more romantic over time, but I haven't really seen a solid indication of that. And if Nea and the overall focus on the plight of trans youth is meant to be central to this story, why mix it in with so much distraction in the form of the other characters and kinks? Hopefully we'll get answers in future updates, but I kind of feel like Luxee is trying to figure things out right now too.