I'm not a fan of the NTR, but not a hater either. But I value the story, in some it is a useful fact, which helps you to identify with the MC, when that factor is removed usually the stories get worse.
In this specific game, I think it can be added somewhere that 90% will have non-MC sex, if there were not I would be surprised, not disappointed, but surprised. I would only be disappointed if you notice the absence of that scene, for example I recently played Oath of Loyalty, and there are some scenes where it is evident that the author had thought of some meaningful scenes without the MC, not I know if they have been removed later, or have never been added for fear of negative comments, the fact remains that I have noticed their absence and in fact I have not played anymore. I also recently had a game where NTR was totally forced and in fact ruined the story. And I also stopped them. Too much is wrong, both in one sense and another.
As for this game, I expect a dark path, from the flashbacks it is obvious that the MC was an asshole before losing his memory, Elena hates it and I'm sure it's because she has been involved in some erotic practice, the same girlfriend seems to have some secrets about how their relationship really was. In short, it seems to me there are all the bases for a dominant and dark MC, if this leads to the NTR then I don't know. I hope that the author feels free to do what he wants and does not feel the obligation to follow a forced path (whether or not with the NTR).
I haven't played the new release yet, so I don't know if any new pieces of history, or flashbacks have been added.