I have to say, I love that the NTR options aren't even visible on the love paths.
I don't just mean that as a "plug my ears and pretend it doesnt exist" sort of way, there are lots of games with optional NTR/swinging where you can just leap from one path to another even if it doesn't make any sense whatsoever for the characters or plot, like you have a 90% lovey dovey playthough but can still choose to let your LI get gangbanged randomly.
Here though, it shows a real care about how characters develop and interact, and also lends more credence to the NTR itself, because you actually have to lay groundwork and work on corrupting the girls, you can't just change your mind and suddenly they're turbosluts. Plus I can enjoy the NTR "guilt free" because those girls are not the same people as the ones on the love path, they have completely different experiences, relationships, and interests that are incompatible with the love route versions.
ofc i get why most games dont do this since you have to create basically two entirely seperate games, but still. much appreciated