This was one of the few NTR games where I wound up liking the douche NTR-er (Baroque) more than I do the actual protagonist. Ares is just such a spineless (but very competent in military matters??) character that it's hard to relate to most of his actions.
In a way the entire game feels set up for a non-NTR scenario, where Ares, the returning general usurps the obviously tyrannical kingdom, ending the unrighteous practice of royal inheritance (which rewards absolute power to those with the right blood, rather than the right ideals), and forms his own new kingdom, with a harem of loyal and happy female generals, ushering in a new golden age.
And the thing is, there's nothing stopping Ares from achieving this, except for Ares choosing not to do it.
That story would make more sense to me than what actually happens in the game; it's like someone plotted out what I said, and then someone else came along and cut it to pieces in order to intentionally force an NTR focus into the story instead, because where you actually find NTR in this game it rarely makes all that much sense. And don't get me wrong, I like NTR games, but the problem here is that the story often doesn't respect its own internal logic; Ares constantly makes choices that don't make sense, and his motivations are just not clear at all. His existence seems to revolve around being a slave to the ideal of the holy king, even though there's no definable reason.
I think what strikes me as most incongruous about the NTR is that in most games where the protagonist gets NTR'ed, it's for one or several of the following reasons; (1) The girls are sluts, (2) MC likes seeing the girls cheat, (3) MC is too weak to protect them, (4) MC isn't around to protect them, (5) MC doesn't know it's happening.
From what I can tell all of these points are false; Ares knows it's happening. He doesn't like that it's happening. He has the power to stop it. But he just doesn't do anything.