I don't think that's accurate. There's lots of scenes that are certainly "NTR light", maybe the antagonist doesn't actually penetrate the girl, but he comes close or threatens too, or openly gropes them in front of you. This is usually way more than someone that's averse to NTR is gonna want to put up with, and I started to encounter more of towards the late game (as late game as you can call a beta .6) which I found annoying and deceptive on the dev's part, bait and switch.
Examples: (spoilers obviously)
These are just the things i've noticed so far, in an incomplete play through. I like the game, think it's worth playing, but claiming it is NTR free is bullshit. Game has a lot of unnecessary NTR content in it that annoys the hell out of people who dislike that sort of content.