But please explain to me what is NTR then, as for me there is. You get to see girls you get to fuck having sex with other dudes in this game.
I think it ultimately comes down to a personal definition of NTR. How strict or loosely you interpret that category. Myself, I'm more strict with it. Some people have no problem with the physical sharing part (brothel), but they want the emotional/spiritual attachment to be exclusive for the MC. Others like myself who are more strict with their interpretation of NTR want both the physical and emotional/spiritual attachment to be exclusive to the MC.
I've played it through a good bit of it, but I couldn't get into it. Maybe someday I'll try again and "stomach" it all in one-go, but that is a personal problem for me, and not a reflection of the game. Ultimately it is from my definition of NTR. Even then, I think its fantastically-built, narrated and has some great story-elements to it.
At the end of the day, each individual has to decide for themselves what NTR is to them. Myself: more strict (Im a selfish bastard); Others: May be more loosely interpreted. There isn't anything wrong with either.