A very common cliché I've seen is that most confuse Netori with Netorare when they are totally different things. The 'Netori' literally means 'to appropriate (someone) for sex', and refers to the situation where a main character steals another character's partner in order to have sex with her. In this situation, the main character see in this case Daniel from ID is the one who accomplishes the action by ''stealing'' Lana from Alex's side to do his.
While in the term Netorare implies partner stealing or infidelity, and occurs when a third person causes infidelity between a couple, either for personal reasons, revenge or fun. As an example, Uncle Peter with Sarah from TH, that there is no deeper motive than that of one's own pleasure. [But beware, here that does not mean that the story of ''Together'' is Netorare, it is just an example]. It refers to the situation in which the main character is betrayed by his partner, who has sexual relations with another person. In this situation, the character who is betrayed is the protagonist or the main character.
And finally, the Netorase refers to the situation in which the main character shares his or her partner with another person or engages in consensual partner swapping.
Something like the “Swinger” couples. In this situation, the characters involved are the main character(s). An example might be Amanda with Liam, as she shares her son with her sister Alexa and recently with Emma.
The main difference between these terms is the role of the main characters.
And for the avoidance of doubt:
''Immoral Desires''. It is part of the genre Netori, since the main character who is Daniel and is the one who commits the action and we see it from the point of view of him, and not from Alex, where if it would be correctly Netorare.
Together'' is also a Netori story because the main character David or at least the acid for longer than Aaron and Uncle Peter, but in the same way and we count them as main characters, the story is still Netori. Why at no point are we in Luke's perspective.
The story of ''SATISFYING NEEDS'' is ''Netorase'' because in it the main characters are those who share their partner or participate in the exchange of partners. In this case Amanda shares her partner/son Liam with Alexa and a few chapters ago with Emma. But the story cannot be categorized as Netorare because Liam's father abandoned them leaving Amanda single on a technicality. Which makes there is no Netorare with her and as far as we know Emma has no partner, and Alexa seems to have a Suggar Daddy instead of a partner as such, which takes away from the fact that the story can be categorized as NTR. Another archetype you could perhaps use would be the Harem genre.
None of Daval's three main stories are “Netorare”, since in it the main character is the one who suffers the betrayal. The only way Daval's stories can be so categorized is if we get practical with the terms, otherwise they just don't.
Your descriptions are spot on. I would only place a question mark on whether uncle Peter's inclusion would constitute NTR. I do believe his inclusion was sloppy, but his sexual encounters are no more of an NTR to David, than Aaron's. That is to say, if Uncle Peter's having sexual contact with Sarah is NTR'ing David, the main character, than Aaron's sexual contact with Sarah, albeit his mother, would also have to be NTR'ing David. I think what hurts uncle Peter's case is not only his age and decrepit appearance, but his sudden introduction, which was bought by a "fan."
And this has little to do with what you've stated Jack_Zy, and more so what I've seen from others when trying to explain away NTR elements in a story, particularly in their saying, "well, technically they're not in a relationship..." For example, when Alexa was dryhumping that pudgy short-haired Elmo in Chapter 11, I saw some responses along the lines of, "well, Alexa is not his mom" or "it's been established that Alexa is slutty, and technically she's not in a relationship with Liam" as if that mitigates the NTR-facsimile that scene portrayed. How much different would that have been from what Uncle Peter's role was in
V.I.P. Madness: Together? That is having a female with whom the main character is involved portrayed in a sexual encounter with a male other than the main character?
Male-female relationships among relatives are implicitly sexual, and bear sexual undertones--especially the mother-son relationship. That's the reason, I assume, that many NTR artists rather than use a woman's husband as a cuckold, uses her son, instead, because their relationship dynamics bears similarities to that of a husband and wife. I state this to say that there's little to no functional difference between what is technically NTR, and what "feels like" NTR. And I hope I didn't insinuate that Aaron was being NTR'ed by David. Aaron has been a background character for about five chapters, only being used as a stand-in for his father, when his mother was "messing" around. If anything, Aaron is NTR'ing David. But this dream sequence reads as though Aaron were the one NTR'ed not because he had a front row seat to his mother's betrayal, but also, Sarah's words, in the dream, double down on that betrayal, not just to him, but his father, too.
