Hi! Thank you for your question.
There won't be any ntr present in the game so you can rest assured.
In fact, the game is supposed to be a "harem" but I didn't wanted to make the harem the focus of the relationships since I don't want to force the player to follow the romantic relationship of characters if they don't want.
Still, things could change but I'm not going to add ntr.
I have plans to add other male characters but those won't be sexually related to the main female cast.
Hopefully this clears your concerns :D