i hope there won't be NTR. Right??
There isn't and won't be any
visible, consensual 'NTR', if you want to call it that, and it'll be avoidable if you choose the right option (will be clearly labeled when the time comes). That is, if you're referring to a man fucking another man's wife/girlfriend right in front of him. The definition of NTR seems to change depending on who you ask, though.
There will be a moment in the game that the female protagonist gets herself into a certain situation, but you either A) won't see it happen, or B) stop it from happening. Player's choice, of course.
That is one reason for me others are I don't like to play female protagonist games and the multiple protagonist thing is also often used to avoid tags like NTR or sharing.
There's no consensual NTR, as stated above. There may be an ending where the female protagonist chooses to get back with her ex, or not, but it'll be a choice when that time comes. As previously stated, everything is or will be optional apart from the multiple protagonists (provided I don't change it). The only sharing that'll happen will likely be within the harem path/route, and again, will be completely optional.