I guess everyone has their tastes. I would not like that situation with Nea, but a similar approach with other LI (maybe one of the sisters) could be interesting.
Well, the thing is, if too many characters had the same overall script structure, the game would become stale pretty easily. Having to deal with various flips and hurdles depending on the character is what give spice to the whole thing.
Now, I get that some people would like to keep Nea's story going without having to go into romance. Some people can't really dissociate genetalia from gender. That's still pretty new as a concept for most people.
But, if you think about it objectively, it actually makes a lot of sense, logically speaking, with the character.
"Noah" wasn't feeling at ease in his own skin as male. A lot of trans people start of like that. And despite not being really educated on the subject, I imagine that that type of... Body dysmorphia I guess, can most likely be quite a bitch on the person's psychee and mental health.
Add to that the fact his dad seems to be the pinacle of the anti-gay dumbass who'd claim loud and proud that "this is not how God intended it", and you can easily imagine how deciding to transition would be an extremely stressful, and most likely terrifying when it comes to the ambiance at home, thing to go through.
And not, to top it off, there's all the bullshit at school. The mocking, the bullying, the people making sure to keep stoking that flame for as long as they can...
Honestly, strickly logically speaking, I think a lot of people going through all that would probably take the jump way earlier than Nea's route shows.
Now, as to why it's not that surprising for the scenario to go down that route. It's actually pretty simple.
Nea has no hope. She just goes through the motions, let her shitty life carry her by just surviving, scraping by, mentaly speaking. And then, a good looking guy comes along, who not only defends her, but also doesn't question her gender. He's talking about her as a girl, he's accepting who she is and wants to be, he defends her against the assholes that made her life a living hell.
No surprise that she'd fall in love. That's pretty much the first person to care about her, apparently. At least, to involve themselves as much as the MC does.
Now, imagine how much hope that'd give someone in her situation. The guy's not only pretty much the definition of a white knight, but he stays involved, supportive, caring and nice. And most of all for a heterosexual trans girl, he's open-minded.
Nea doesn't think of herself as a dude, she sees herself as female, despite her genitalia at that point. A girl that's fallen in love with the first guy ever to see something else in her than a freak.
But then, after all that hope, all that happiness, what do you think would happen, mentally and psychologically speaking, when that guy rejects her feelings ? With all the background of rejection of what she IS at her core ? It's pretty obvious that's devastating, and not surprising in the least that it pushes her to such actions. She's highly emotional after being so deprived of support and caring, and the person to finally give her that rejecting her love, the feeling of rejection that ensues just gets extremely magnified by her past.
As much as this is a smut game, it's also extremely well written at times. Sure, some part are just in a more "heh fuck it it's for porn", but a lot of the older characters actually have extremely well thought-out personalities. And, in my opinion, Nea's probably the deepest one so far. It might not seem like it when you don't care to think about it, but the depth in the psychology in her route is actualyl really impressive. Not only that, but it's also taken, I think, fairly realisticly as well. Way to many games take the easi road of "yeah trans girl is a slut".
This dev didn't. They chose to be more logical and realistic.
And come on, their romance is cute as fuck.