OK lets really dive into it.
There are 3 main types that fall under the broader umbrella of NTR.
1) Classical NTR - girl gets stolen
2) Netorase - guy wants his girl to get sexual with other guys. Pretty much the willing cuckold tropes in the west.
3) Netori - guy steals girl
The classic NTR has 3 sub types according to VNDB, but that's not too important to get into.
How do you distinguish between NTR and netori? It largely comes down to the main POV character. If we see things from the cuck's POV, it will be NTR. If we see things from the bull's POV it will be netori. If we see things from the female POV, it can be any of the 3. Netorase will usually be from the cuck's POV but it can also be from the girl's.
So what does it mean to get "stolen?" Many people get lost here. Let's look at the most common targets for the classic NTR.
1) Wife/GF - not too complicated. She leaves the husband/bf or prefers the antagonist over the husband by the end.
2) Mother - A sexual relationship or attraction between the mother and cuck is not necessary, although it can help. She leaves the family or abandons her motherly duties by the end.
3) Sister - Younger sister used to look up to her "Oni-chan" that relationship is lost at the end. Older sister may be the protective type that used to protect him from bullies, but starts to join the bullies and looks down on her pathetic bro by the end.
4) Childhood friend - There is almost always an unrequested love or "will they? wont they?" type of thing at first, but it is not totally necessary. They can indeed be platonic friends who care deeply for each other. She starts to see the childhood friend as pathetic and doesn't care about him at the end.
In all these cases, there is something that is stolen. How do we go from the initial stage to the end point where the good relationship is lost? Corruption. NTR, at it's core, is all about corruption. The females generally need to be rather pure and good hearted at the beginning. They get corrupted as the plot progresses, usually due to the mind blowing sex from the antagonist. Indeed, if the mother was always a whore that would fuck around with random strangers and was a terrible parent to begin with, there is nothing much to be lost here. If the girlfriend was a total gyaru slut at the start and the MC was just one of her boy toys, things are not so clear cut. Of course, these kinds of set ups can still produce some feelings of NTR depending on how the author writes it, but the lines get a bit blurry.
This is why I said the intention of the author is pretty much the most important thing when it comes to NTR. It's rather hard to write an NTR story unintentionally. There may be some scenes or plot devices that could make someone feel like they've been NTRed, but that is mostly the fault of the reader. Some people are incredibly sensitive when it comes to their girls getting any contact with a different dude.
For example, lets say there is a story where you are in a happy romance with a girl. She gets raped by some dudes. The rest of the story revolves around the MC trying to heal her wounds and guide her through her trauma. She recovers and they live happily ever after. That's not NTR, but you better believe that many people would be talking about NTR in that thread. Actually, there was one game called Bad Teacher (rip), that had the opening scene of the MC walking in on his wife cheating with her female boss. He immediately leaves her and the reset of the game is him fucking all the females in the game. Yes, there was lot's of NTR talk. I think they even added the tag, but this is not a NTR story. It's important to note that NTR denotes the tone and progression of the plot, rather than any single sexual act.
Some other food for thought. Let's say we have a netorase or willing cuckold story. The husband asks the wife to indulge in his cuck fetish and she reluctantly (or not) agrees to please him. Now we come to the cross roads. If everyone is happy in this relationship, we just have the netorase story. However, netorase is not as popular as NTR. In the vast majority of cases, the female will start to get hooked on the other cock and end up leaving the husband in the end. Alternatively, she might not leave the husband, but the husband comes to realize that he is not so happy about it, but still gets aroused. A depression boner if you will. These kinds of stories can be seen as a hybrid netorase/NTR or something.
When taking everything I said into consideration, you can see how NTR is such a confusing mother fucker. There can always be outliers and edge cases that could throw things off when trying to classify it, like what you are doing with your examples hehe.
Edit: Damn I realized I read this part wrong. I thought the boyfriend would not get sex from either wife or husband. If the husband can sex him... I don't fuckin know lol. That is so crazy. Hard to wrap my head around this situation.
Ok, that shit was so long and you are probably the only one who will read it, but since you put a lot of thought into most of your posts, I tried to reciprocate.
There are 3 main types that fall under the broader umbrella of NTR.
1) Classical NTR - girl gets stolen
2) Netorase - guy wants his girl to get sexual with other guys. Pretty much the willing cuckold tropes in the west.
3) Netori - guy steals girl
The classic NTR has 3 sub types according to VNDB, but that's not too important to get into.
How do you distinguish between NTR and netori? It largely comes down to the main POV character. If we see things from the cuck's POV, it will be NTR. If we see things from the bull's POV it will be netori. If we see things from the female POV, it can be any of the 3. Netorase will usually be from the cuck's POV but it can also be from the girl's.
So what does it mean to get "stolen?" Many people get lost here. Let's look at the most common targets for the classic NTR.
1) Wife/GF - not too complicated. She leaves the husband/bf or prefers the antagonist over the husband by the end.
2) Mother - A sexual relationship or attraction between the mother and cuck is not necessary, although it can help. She leaves the family or abandons her motherly duties by the end.
3) Sister - Younger sister used to look up to her "Oni-chan" that relationship is lost at the end. Older sister may be the protective type that used to protect him from bullies, but starts to join the bullies and looks down on her pathetic bro by the end.
4) Childhood friend - There is almost always an unrequested love or "will they? wont they?" type of thing at first, but it is not totally necessary. They can indeed be platonic friends who care deeply for each other. She starts to see the childhood friend as pathetic and doesn't care about him at the end.
In all these cases, there is something that is stolen. How do we go from the initial stage to the end point where the good relationship is lost? Corruption. NTR, at it's core, is all about corruption. The females generally need to be rather pure and good hearted at the beginning. They get corrupted as the plot progresses, usually due to the mind blowing sex from the antagonist. Indeed, if the mother was always a whore that would fuck around with random strangers and was a terrible parent to begin with, there is nothing much to be lost here. If the girlfriend was a total gyaru slut at the start and the MC was just one of her boy toys, things are not so clear cut. Of course, these kinds of set ups can still produce some feelings of NTR depending on how the author writes it, but the lines get a bit blurry.
This is why I said the intention of the author is pretty much the most important thing when it comes to NTR. It's rather hard to write an NTR story unintentionally. There may be some scenes or plot devices that could make someone feel like they've been NTRed, but that is mostly the fault of the reader. Some people are incredibly sensitive when it comes to their girls getting any contact with a different dude.
For example, lets say there is a story where you are in a happy romance with a girl. She gets raped by some dudes. The rest of the story revolves around the MC trying to heal her wounds and guide her through her trauma. She recovers and they live happily ever after. That's not NTR, but you better believe that many people would be talking about NTR in that thread. Actually, there was one game called Bad Teacher (rip), that had the opening scene of the MC walking in on his wife cheating with her female boss. He immediately leaves her and the reset of the game is him fucking all the females in the game. Yes, there was lot's of NTR talk. I think they even added the tag, but this is not a NTR story. It's important to note that NTR denotes the tone and progression of the plot, rather than any single sexual act.
Some other food for thought. Let's say we have a netorase or willing cuckold story. The husband asks the wife to indulge in his cuck fetish and she reluctantly (or not) agrees to please him. Now we come to the cross roads. If everyone is happy in this relationship, we just have the netorase story. However, netorase is not as popular as NTR. In the vast majority of cases, the female will start to get hooked on the other cock and end up leaving the husband in the end. Alternatively, she might not leave the husband, but the husband comes to realize that he is not so happy about it, but still gets aroused. A depression boner if you will. These kinds of stories can be seen as a hybrid netorase/NTR or something.
When taking everything I said into consideration, you can see how NTR is such a confusing mother fucker. There can always be outliers and edge cases that could throw things off when trying to classify it, like what you are doing with your examples hehe.
This is indeed extremely unusual and I can't imagine it has ever been explored. Rule34 is a thing though, so I bet it exists somewhere in the corners of the internet. In this situation, if the POV of this story was from the wife or husband, it would certainly not be NTR. It is more like swinging. If the POV character in this was the new boyfriend, I would say that it is essentially a voyeur story. If the boyfriend fell madly in love with the girl, but felt so terrible because he couldn't fuck her and had to watch her have sex with the husband, well... that would be a slight blurring of lines where NTR is splashed into the voyeur story. It might involve similar emotions, but the wife cannot be "stolen" from the boyfriend here. What if the boyfriend is like some childhood friend of the girl and they very much care for each other? He finally confesses his love, and they come up with this scenario? Holy shit, things are getting complicated. This could turn into NTR in specific circumstances if the female starts to lose her respect or affection to this new boyfriend due to whatever is happening throughout the story.So what about if the Husband and Wife consent to an unusual sexual relationship, and she gets a Boyfriend. Is it NTR if the Boyfriend isn't allowed to fuck the Wife but the Husband is? IE does it matter if the Boyfriend is the cuck vs the Husband being the cuck?
Edit: Damn I realized I read this part wrong. I thought the boyfriend would not get sex from either wife or husband. If the husband can sex him... I don't fuckin know lol. That is so crazy. Hard to wrap my head around this situation.
I think this was basically answered by all the stuff above. I actually have no idea what Yandere Sim is really about, but from the little I've seen of it, it just seems like a sociopath simulator. It might have a touch of "reverse netori" (where the POV female protagonist steals the guy from other girls), but I don't know if it really explores this. Could it also have a bit of reverse NTR (where the female loses her significant other to another girl)? Maybe, I don't know enough about this game. Did the yandere chan and sempai have a healthy relationship before? As far as I can tell, it really isn't focused on any of these things. It's just a yandere story about a crazy yandere psycho lol.More to the OP's questions, are there specific acts which define NTR? With refusing Yandere-Chan's NTR status, it seems to indicate that NTR requires some kind of act, intention, and some kind of involved relationship of which two or three people are knowledgeably aware?
Ok, that shit was so long and you are probably the only one who will read it, but since you put a lot of thought into most of your posts, I tried to reciprocate.
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