Yeah, I see what you mean. When the FMC and girls never quite give into the corruption and remain loyal to their original loved ones, there isn't really the "holistic satisfaction" to it or ecstasy as when the FMC/women in question completely give in and start to proactively seek out and revel in the debauchery even despite the fact they are unmistakably and consciously aware of cheating on their loved ones with another person.
The experiences when playing the game feel kind of hollow so to speak and if the girl never gives into the corruption from the other party (or parties)....it almost seems "forced" in a sense and just not a very exhilarating experience. Gets boring after a while IMO.
With each chapter, FMC opens up more and more to debauchery. Corruption first the body and then the mind.
Did you even play the game or saw the gallery? In the last phase of the scenes, she just gives up and comes on her own to "proactively seek out for sex even despite the fact they are unmistakably and consciously aware of cheating".
The style of the story is trying to be dark & realistic and at the end she fell as far as the narrative style allows it.
I liked this game even more than the previous ones though, finally no lolis.