Potential Harem ending via choices. No NTR. As the story is (very loosely) historically accurate, there will be some "housemate" scenes but does not include any character related to MC.
Now a Bit of NTR is ok as long as All that do that Are Willing and able to Accept it. Now i am not saying that All NTR is good or Bad. It all depends On just how Kinky the People are, And that they Understand that it is Just for Fun and Play. However if the People Like it, then Maybe this game/VN is not for them.
Please Note Any NTR should only be done with a Partner or Partners that Know it is Not RL(real Life), and they understand that only what they talked about before In the Dealing/Nenegotiations & that at Least one or More safe words are given or Chosen, which is Known to Stop the Scene.
Yes if you are Playing with something as dangerous as NTR, You must make sure that Both You and any Partner/s your with Understands What is Planed and that they(your Partner/s) Know this can can Be or Feel Save with you.