Some probably haven't noticed that the every scenes are in variation throughout the game.
In the "ntr" path, not exactly traditional ntr because wife is not stolen.
First choice gives mc the decision whether Eva does it or not, if mc says no the sex won't happen. And mc participate in most scenes it's more like a sharing threesome setup.
Second choice is the cuck path where mc just watch and jerk off at the side and doing the cleanup etc etc. Wife do as she please because as they have agreed her pleasure is the priority and mc likes watching on this path. So yea not traditional ntr because wife isn't leaving mc for anyone.
In every encounters the scenes are in variation based on the 2 choices above, so the sauna scene had 4 variations based on the two paths and also with or without Robin in each of the path.
The "netori" path, as everyone calls it bull path is more accurate. Like one of the best netori game on here
HeroPartyMustFall. Girls literally fell out of love with their lover and fall for mc, hence stolen.
Bob likes to watch his wife Lia, and mc just fit in the bull role to fuck her. Lia doesn't leave her husband for mc and mc has a loving wife who is willing to share him. Everyone is happy, yay. And if mc's wife is involved in the threesome with Lia after Bob drink too much, as epilogue says it happens from time to time. Scenes variation are based on the choices and bully points is just the requirement for some of the choices.
I like the bull path where mc is depicted as the bull role rather than traditional netori though, it's rare af.