Actually I also feel the whole genre non-canon mostly because we can simply turn it off even in the settings, and it not even changes a single dialogue or a word in the rest of the game.
Instead of the option to switching the NTR on and off, maybe they should have made a whole NTR-DLC from the beginning just for the audience, who are interested in this genre. In this case everyone would be satisfied.
I'll stand my ground on this matter, the main story should have contained NTR, but in a DLC no one have to worry about what kind of content they will encounter... In this way the obstacles to my long-desired NTR mini-game would finally disappear ...or when we are simply just idle at the base, maybe we could see such events, as the heroines entering randomly their own room with the specific bull for a round.
A new NTR-DLC could also include a few new quest, in which the bulls are already involved. Obviously bigger the team, better the quest..
These missions should obviously contain NTR scenes which I imagine in two ways:
1.
Story based events: The NTR scenes are part of the actual quest.
2.
Non-story based events: Here, it would be possible for the heroines and the bulls to regenerate each other's HP in the usual way. Just the only problem, there is a possibility here, if for example Kirara is regenerated by Hikari's lover and so on, which may not be everyone's liking..
But there is another option... If we are idle with the MC for too long during a quest while there is no enemy anywhere, the heroines and their (NTR) LI could have some fun during this time. It sounds sweet, especially if they hide somewhere to fuck..
That's all I could think of suddenly... The only problem, a DLC like that would be related to the events of the base game and the previous DLC's NTR, ergo its start bound to time.. But fortunately the most of us already completed the game.