Every NTR choice is labeled on the choice menu with "(NTR)" after the choice description.
If you choose any alternative, you will not see NTR for the character that choice impacts.
NTR is mostly contained to the Dark Path CHOICE (Around day 69/end of Chapter 1)... There are some characters who are independent of the main path choice.
We decided to split the game like that for simplicity. The Good Route and Dark Route were so divergent overall, it was simpler to give players the choice of how the MC evolves during Chapters 2 and 3, rather than do individual paths for all 30-40 characters.
Rose can remain yours if you avoid her specific NTR options. If you choose Good Path, only a few characters are independent and have NTR choices.
NTR is 100% avoidable on Good Path.
Dark Path has most of the NTR choices, but it's still avoidable by choosing any other option in that choice menu.