Big fan of impreg (and pregnancy! They are different stages that occasionally get separated, so some games only have one or the other. I'd like to see both!) here, so you already had my attention from the concept.
Alright, I can see where it's going. I wouldn't kill the wimpiness, but dial it back a bit more. It was... annoying to "hear" him complain all the time. At the least I hope his confidence improves and he's not another one-note semi-limp dick-haver who's just there to get used and get off. Of course, it's the beginning of the story, so I'm not really ragging on the character too much until I can see more of it, I'm just a bit tired of the character trope. He can still be nice - I like that trait, defo not a sadist here - but it always comes with a basically-in-tatters sense of worth.
Saw a similar comment down below that I agree on a part with: the impreg x-ray is a heavy must have; the moment of conception is very hot!
Now, depending on whether it's a pure visual novel or one of those sandbox games: being able to improve your virility would be nice. Seems like a setting where you climb the ranks, improving your worth and all that jazz, so it seems interesting!
And hey, if the story's good that's like a HUGE plus for me to come back several times rather than whack it and sack it, moving on. So take care and develop your world with respect, not that I doubt you're able to do so.
(This one's more personal, but if we can make the netori part optional? I see that's a possibility from Madison's character description and I'm not much of a fan of stepping through someone else's relationship unless they were an absolute dick and their partner deserved someone better. And hey, ain't saying it's me, but it's also not hard to be better than a douchebag.)
Currently, I see this version completely as a pure concept - this demo section defo needs to be fleshed out more in order to feel more compelling. I can read super fast, but I still went through it like lightning! The story hits all the notes, but it doesn't really stand and develop them that much until you get to the first lay - which pretty much was just focused on physical attributes. I can't give strong advice in that regard, I'm no writer, and with stuff like this it's more challenging than going "dick go in there, women swoon, guy fulfilled."
But yeah, that part comes with the "this is a concept" remark, so feel free to not think about that section.
Overall, very promising idea! Looking forward to it and your team's progress!