I'm not saying this is good enough for you or anything, but you can totally avoid the NTR if you want. At the beginning of the game, you're asked if you want to include NTR or not; just exclude it and you don't have to see it. I personally feel you're missing out if you avoid this game because of completely avoidable NTR content, but ofc ultimately it's your choice.
FYI, the only NTR-ish stuff so far isn't exactly NTR. A girl the MC is interested in is already in a relationship, so it's not exactly NTR to get intimate with an existing lover. Presumably, this would happen whether the MC knew about it or not.
Also, another girl the MC is interested in has brief sensual/sexual content two times, both before being officially involved with the MC in any real way. (The second time is right before the real beginning of their becoming closer; you also have the choice — even with NTR turned on — to stop it from happening.)