How much ntr content is there if i want to see ntr only content?
There is quite a lot though it's not quite the NTR content where the MC's girls are stolen from him and instead it's more of the sharing kind. First of a few of the girls are already in a relationship or about to start a relationship with someone else. You can then choose to either let them start/continue with the other guy and at this point the MC can in some cases not sleep with the girl at all I believe and just be a creepy dude spying on them or he can also start a relationship with them. So in most of these cases I'd actually say it's more of netori since you either make a choice of them starting a relationship or staying in the relationship and your the partner they cheat with.
The only exception to this where the women can be seen as taken against the MC's will is if you at a certain point don't stop a certain someone from being in charge since if he's in charge he will rule that all women are free for all and when some ppl come demanding tribute he will send them as tribute. You can also make these choices if the MC is in charge but then it's the MC who decided this instead of being forced into it. There is also some scenes if you lose to humanoid enemies while you have girls in your party, also two dwarf girls will be taken at one point and if not rescued fast enough well...stuff happens.
You could say one girl will on her own choose to "cheat" on you if you don't progress her romance far enough but the MC has started a bunch of other relationships (with some specific girls) since she will then think all you want is sex so she wants an open relationship with the MC and then goes to start a relationship for "love" with another guy but still comes to the MC for sex.
But overall this game isn't going for the standard NTR trope I would say and it is more of a do you as the player want the MC to be someone who sleeps with girls who are in a relationship with someone else or do you want the MC to share his women with others.