Here is my feedback as a netorare-enjoyer who doesn't like netorase vibes.
I'm actually pleasantly surprised that at least so far, you don't have to get the MC to knowingly and willingly become a cuck/netorase kind of guy. There is hope for netorare yet. I thought that event with Bryce would be some netorase thing, but Ajit swooping in and cucking both of them was a nice touch.
If there is an advice to give, I'd say that you should slow down. You seem to be considering a full scene as an "NTR event," but satisfying NTR needs some more time to simmer and build up. Because if you blow that load on the first scene, where do you go from there other than the repeat of the same thing over and over again? Like Ajit and the red head girl have banged and she is in love with him. On the first scene. That arc is essentially done and it was the first event.
For me, the flashback stuff were actually more conductive to NTR storytelling, simply because that is not part of an NTR arc and it's just showing the player something that happened in the past. For something like that, it's fine to go full sex and showcase the scene as you wish. That said, you can't just always rely on flashbacks or dreams or whatever. It would be prudent to get a feel of building up scenes upon each other and planning out a progressive arc for each girl as they get more and more corrupted. And as a netorare fan, I personally would enjoy it if the MC wasn't overtly pushing them into NTR but inadvertantly causing it like he has been doing so far. But if you want to go for netorase stuff, that's your choice as well. It should just be written with deliberate intent on which flavor you want to go with so there is some thematic consistency. And if there are choices that can lead to either variation, that would be even better.
Btw, I have a weaker machine, so I noticed that the animations that play in succession tends to lag during the later ones. This usually means you are not clearing an animation before playing the new one so the first animations are still playing in the background or something like that. Maybe check that out.