We had cheating/blackmail/rape hentai dating back before such term even existed..
NTR I think its just as an sub-genres to cheating,

and like Beauty is in the eye of the beholder...

what you take as ntr, for me is nothing more then simple cheating..

the point of ntr is to create that feeling of sexual jealosy and/or distress.. that some mangas categorized as such don't do..

I can't believe this post is still alive. Your right NTR is cheating but it is started after being seduced most often the case forced.

I wonder how far Trejon has read, according to his listing, it's only 8 but I don't know how lax he is about updating.

I've read past that point now but how do you say it without spoilers? It's obvious from the audiences' point of view because the hints are there and we saw a tag about it, and someone made a whole thread about that tag.

Whatever suspicions the guys had are pretty small(plus people do want to trust people). It isn't like a porn or even like chisa X Pon. Sex itself isn't a big issue, and the guy doesn't suck at it, and the other guy isn't better at it.

It could be seen as NTR because he does see his girlfriend in the middle of sex and it really hurts him. Anyway why battle over semantics, I consider it a good thing that we, the audience, have some warning.

But she isn't seduced, raped, or brainwashed. This is actually like reverse NTR happening. The situation doesn't start from the usual position, and this manga doesn't like to portray people as monsters or be really mean(even to the audience).