I don't even know what this argument is about. First off, please don't start this eternal NTR fight again. I, and others too, don't like to chew through what NTR actually really means by definition. It seems hopeless to explain that, most of all guys
seemingly don't want to understand it anyway. Regardless, NTR is not a taboo at all, it´s just one more fetish of many. On top of that, there is no NTR in this game. It's not even planned
Back to the topic. Guys, you should maybe remember this is a sandbox game. In contrast to a VN, which really has a continuous red thread until the end, based on a main plot, a sandbox game usually has one rough, short main storyline. Everything else is what we make of it. This time, there are many main girls, some side girls. Some routes will be connected to each other, others not. And in sandbox games there never is the one real storyline! When we are done with one story, we can pursue another. As a rule, each main girl has at least 1 own ending later. Which is our real ending, we decide by ourself. So it will be similar to MOTH, as example.
Incidentally, Nea is only 1 main „girl“ out of many. In addition, you can choose whether something should happen between you and “her” or not. So you´re not forced to have sex with „her“.