I'm gonna drop this until more comes out uncensored. No point reading something like this if it's censored. I know sex and such isn't the main focus of the story but it's a heavy presence so censoring it just ruins it.
The idea that people have that this is NTR is misguided. It's called that because he was dropped into an NTR manga. No actual NTR is happening. I loved her first isn't NTR and it's far more pathetic to claim it is. Literally claiming girls that aren't yours at that point.
Reminds me of another NTR isekai series where the main guy "steals" the girls away from the "hero" character. He didn't steal them because they were never with the "hero" to begin with. though in the case of that manga he did use somewhat underhanded methods. What amazed me about that one is when the "hero" finds out he literally destroys the entire city in his rage trying to kill the guy and it's somehow portrayed as justified with loads of commentors agreeing and cheering it on. The girls didn't belong to the "hero," his relationship with them was shallow because NTR dude kept them away form him (for his own good). Yet somehow because NTR dude slept with them and the "hero" liked them then it's NTR and NTR dude is the bad guy.