Now this is one of the most interesting posts I have seen in a while. I am very curious what exactly it is about this particular VN that could convert somebody who doesn't like NTR. Is it the presentation? Maybe it is the hypnotic music? It is somewhat characterized by repetition. I'm gonna be thinking about this all night.
The slow gradual corruption is the outstanding factor where you experience every single stage of corruption/ntr especially emotionally without skipping anything.
Slow burn always hits harder as it tells a story that has a more realistic progression and has more reach emotionally than if the female character was promiscuous all along and just fell to pleasure from the start which would make no sense.
It is the same with movies/books where properly building up the story, characters and the world around, gives you more time to relate and connect on a deeper emotional level.
The amount of VN’s, RPG’s that have genuine slow burn coupled with corruption/ntr (which always go hand in hand in a proper story) with graphics thats not painful to look at, can be counted on 2 hands and Navigating the Rift is for sure one of them.