Not sure if I understand you completely, at the moment there is only one instance of NTR in the game, at to get that you need to make two specifc choices, both clearly state that it will lead to NTR,
To start you play the Female, and you are asked (the warnings about NTR are next to the answers in the game)
"do you want to resist"
- No (this may lead to NTR)
- Yes
then playing the male MC who on entering the scene will be asked something like
"Do you want to stop this"
- No (this will lead to NTR)
- Yes
Ntr won't happen in this version if you don't specifically
TRY to see it and even then it isn't a complete scene, the MC leaves before he sees anything too graphic, which personally was somewhat annoying