1) Technically we cannot speak of NTR, because we do not see any scene, we discover the betrayal from a confession of the girl, but without seeing anything. In addition, the NTR also has some missing assumptions here, the MC has not accepted it and you can choose to send the girl to fuck and ignore her, also we don't even know the extent of the betrayal, was it a kiss? Only oral sex? Full sex? The fact that you don't know these things is because it's not NTR. This is just a narrated betrayal, which helps us understand the MC, I remind you that the game's choices affect loyalty and disloyalty scores. Surely it makes us feel annoyed, but this is precisely the purpose of the author, it is not a simple addition to put on sex scenes, which in fact is not seen, but it gives us character and can lead us into choices during the story, as happened during the train dilemma.
2) The game is not based on the NTR, that's why there is no corresponding TAG, we can discuss if there should be CHEATING, since the MC suffers it, but as you can see he can also perpetrate it, basically we did sex with Aubrey the morning they were supposed to go out with Lauren.
For the game I have two things to say, the first is to apologize to the author, I started it smiling, imagining a copy of a title surely known to you, but in the end I must admit that this game has a character of its own which reduces the all to a simple inspiration, and the cinema is full of inspirations that have turned into works of art (Reservoir Dogs for example). So at the end of the day with respect to the author, wishing him the best possible luck, as soon as my pockets allow me I will become a patreon.
Second thing ... do you trust chloe? I must admit that I just can't do it, for heaven's sake at the base of these games there is always the MC to which no one gives weight that makes the leader of the cheerleaders fall in love, yet this time it seems different to me, it is as if she were determined to keep this secret dating, and it makes me suspicious, of course it could have its reasons, like avoiding grayson's fury, but I admit that when I went to the gym appointment I was afraid that Grayson and his friends would jump out to beat me. I don't know, I don't trust.
Lauren on the other hand, well, I didn't like how she behaved in the test. For now my favorite is Penelope.
Now I have to start over though and play seriously.