As far as I know netorase should be sharing/swinging as a tag, the fact that peaple that do not like one usually do not like the other often creates confusion, I personally have a very extreme stance on it so I tend to avoid games with even mentions of it, still it seems like a trend lately to mix harem and NTR.
So in conclusion the achronym NTR can stand for all types but as far as tags are concerned it only applies to netorare, netori is cheating and netorase is sharing/swinging, I am waiting for clarification on this game specifically to see where it will go but for now it seems more sharing than NTR, I still do not like it but by definition it should be avoidable, it depends on how it is implemented, the problem is that when a dev tries to please both sides one is always disappointed, the NTR fans are probably going to complain that there is not enough and the harem fans are going to complain that the existence of NTR ruins the game for them, if the dev had an original plan for the story it will be pretty obvious which one it is and the other is going to suffer for it, I will never undestand why peaple still try to make games with things that are clearly opposite, harem implies exlusivity, NTR implies the opposite, it is pretty obvious that peaple that like one will hate the other, exeptions do exist but I highly doubt that there are enough to create a target audience out of.