*reads some of the thread*
Well, aside from the whole "this game has been in development too long"...
The "open relationship" topic introduction near the beginning of this story is awkward, off-putting. It really should be more organic, a part of their relationship narrative derived from previous experiences and it should really be placed later in the story. If it's later in the story, we get to experience the MC forming bonds with the other girls, wanting to explore different things. Maybe the 5 year relationship he's had is getting stale for him. Maybe he wants to breed them all, I don't know. I have no idea where the dev wants to take the story, I don't remember there being a "future tags" anywhere here.
I mean, I'm just getting to know this chick he's been in a 5 year relationship with, and it ain't been 5 years for me. And she's hot. And sweet. And she wants muh babies. I got no problem with her.
Well, it's in beta and in development, so maybe that'll all change. Who knows.