The one thing I'd like is, if there was maybe some more catharsis in the breakup routes. At least some of them. I definitely get that the fact that the girls seeming to feel pretty much zero guilt is part of the fun for some people, but if there was just, like, something to help calm my nerves or make me feel like there is some justice in the world afterwards, that'd go a long way for me personally.
I'm much more of an NTS fan than an NTR fan, but there's a lot more NTR out there than NTS (at least in manga form, this is my first time with a game like this) so I often end up stuck reading stuff that's only about 60% of what I like, and then just having to go find some distraction afterwards to chill me out. I enjoyed my first playthrough of Catheryn's route, since if you play along the whole time it's pretty much NTS that goes too far/fast which is what I'm looking for. But then the fact that her feelings for the MC are so shallow that if you don't play along she dumps you or cheats anyway without a shred of guilt sort of robs that NTS of some of it's fun for me.
But I get that this is an NTR game not an NTS one, so you're not necessarily trying to cater to NTS fans or anything, and that's fine. I'd just personally have a lot easier of a time with the whole thing if the breakup routes had, at least to some extent, some more acknowledgement from either the girl or a third party that she's acting insane, rather than just the MC calling her crazy and blocking her, or the MC calling her crazy and her being casually callous and he blocks her. Like maybe if during the breakup routes there was another dialogue option you can choose that was clearly denoted, like a different color or something, if you don't want quite as much suffering involved that has some amount of apology or something involved at the very least. Like I'd love it if in the Polly route, after that final confrontation (which I know you're changing eventually anyway) if you break up with Polly, you could talk with Anna afterwards about it. Not to hook up with her, just to to vent. Stuff like that. Just something to validate your feelings if you chose the breakup option.
Obviously wouldn't work with all of the girls, but Rachel's breakups in particular felt rushed and brutal. Like she's been secretly cheating for actual months and it all ends without her saying a word about it either to defend herself or to justify herself or anything and then getting blocked. That does seem to pretty much be the point of her routes, but an optional "save your soul" ending for some of the more brutal routes would be a really nice option to have.
But again, I know the thing I'm asking for is for you to cater to a different audience than you're trying to cater to, so I totally get it if you don't want to do that. But if you did make the breakups a bit more thorough with more closure, that'd be a big plus for me.
All this to say that the game is really well made in general and if the things I want added don't fit into the spirit of what you want to make, that's totally fair, this isn't intended to be critical at all actually, just more a thing I'd like to see added so that I can enjoy it more.
Anyways. Just some ideas, but it also sounds like you're working on the game pretty constantly, so it's not something I actually expect to see implemented or anything. It'd just be a nice feature for some of us, haha. Just a short side path with some more closure for those of us who need that. Not necessarily fixing the relationship, even just something like "I hate you and I'm justified in hating you" that isn't immediately dismissed or ignored by the female character would help. If it were clearly denoted as non canon in some way you might be able to avoid upsetting the hardcore NTR fans, but I don't really know. Seems like NTS fans and NTR fans kind of hate each other when honestly the kink is pretty similar, just tonally different. I find that there are quite a few NTR stories that would make great NTS stories with only a few small changes, and I kinda wish more of the content out there just had an NTR version and a separate NTS version. But that's a ton of work and if the author isn't into one of the two, it's work they'll hate doing. So I get it.
Sorry for the super long post that I've also edited a billion times. Just wanting to provide my feedback but also trying to not be condescending or entitled. To be clear, the NTR is up there with the better stuff out there imo. Just personally wish more NTR came with aftercare in general, haha. And you actually seem to read and consider feedback unlike most authors.
But yeah don't change it if that goes against your artistic vision. But if it doesn't, it would be a great thing to add someday.