Lol. I was asking you how’d you categorize Netorase since it’s still under the NTR umbrella.
It's important to keep in mind that the three types of NTR is sexual by nature. There are two things that NTR is predicated on:
1. One or two characters are in a relationship and/or have feelings for each other.
2. One of the characters has sexual relations with a third party.
After all, if neither characters were interested in each other, then the third party isn't exactly 'stealing' anyone. Additionally, if they are in a relationship, and one character has feelings for the other, but the other doesn't, then it's just plain cheating.
Netorase satisfies the two conditions above that makes it NTR. In netorase, the one who agrees to let the other sleep around
tends to want it to happen, and they take consenting actions to make it happen with full knowledge from all participating parties.
TL;DR, I classify netorase as NTR.