It's hard to find good games just about Netori but there are a few
NTR legend, Handyman legend, Ntraholic
There are some games that are not entirely Netori focused, but are good and sufficient.
Waifu Academy, Long story short
Have fun!
Brother, NTR is like shit, I have seen works that upset people's psychology. NTR is when another character steals the main character's woman. This is the most basic explanation, although I hate it, I have to admit as a hypocrite that I love Netori, Netori is the "main character" stealing someone else's woman. And this game is the best Netori game you will ever see, without any NTR in it. Go and play you won't regret it