Harem -> Great
Netori -> Great
Netorare -> Bad
Honestly speaking, as a guy who reads like 95% Harem mangas I can say NTR (Netorare) dont mix well with Harem. Never did, never is, and never will be. Thats for people who can either enjoy both, or are these few people who can read it from the third perspective and dont mind it. With that saying it -> I ( Despite what happend to the Childhood friend ) "dont" see it as NTR (fetish wise). Why ? -> Probably because we didnt saw her having sex, but also we saw how terified she was after that, so we can assume she didnt enjoyed being fucked too. Why im saying it ? Because if people see it her "enjoying" it or even saw her having sex at all, its where we go into the "getting cucked" field, hence they skipped on this part. Hence I also dropped "Ball Girls", despite no one having even sex with other guys, the specific scenes were made to make you feel "cucked" as they did them.
So at least for now I will give it some chance, since we already saw the most "bad" thing already happend and is behind us, while the good is ahead of us. Still, kinda reminds me of the trash manga "Lust Geass". Hope it wont make the same mistakes.