Are there any series about deception-based "NTR"?

[Oobaka-san]

First off note the quotes. I added the quotes to make it clear that I'm not asking specifically or exclusively about stuff in the "Mature" category (AKA hentai). I'm ok with examples in that category, but I'm also completely fine with stuff outside. Basically, I'm looking for stuff where a guy's significant other or mutual crush is taken from him through some kind of deception or uncorrected misunderstanding. I've seen one or two hentai like this, where a girl is convinced that her boyfriend said or did something (like maybe revealing things about their relationship they promised to keep secret) that convinces her to leave him or something like that. The best example I know of in general though is a non-hentai series (one which doesn't actually reach the deception reveal until a point in the novel after the manga's end.

Spoiler

The series is called Ryuusa no Ori. In the story, the guy is in a school that focuses on various powers. The MC entered the school with his two childhood friends, one a boy and the other his girlfriend. He specifically entered to accompany his girlfriend as she pursued her dream, but while his childhood friends and his girlfriend in particular excelled and flourished, his power quickly hit a wall and he wound up an outcast, hated not only for his poor grades but for the audacity of the worst student to date the school's top. Then one day the hate skyrocketed as rumors spread that he was cheating on her, and soon after his girlfriend furiously dumped him after claiming to have caught him in the act. She soon after started dating the guy's other childhood friend.

It's later revealed that this other childhood friend had illusion powers, and had used these powers to make out with various girls while made to look like the main character, first to spread rumors and then to get the girlfriend to catch it. He'd wanted the girl for the longest time and couldn't stand that "his" girl was dating a loser like that. The ex-girlfriend was never willing to go beyond handholding though, and things come to a head when the guy finally snaps and tries to force things, at which point the main character manages to stop the situation and later both reveal the deception and ultimately defeat the bastard. Unfortunately by this point the guy had a large harem of potential love interests and a specific girl he was interested in, so even when some time later his ex comes to him and admits that she does still love him it's made clear that it'll take hard work for her to even gain a real position at the very bottom of the list of romantic candidates.

 

[Mangamoz]

First off note the quotes. I added the quotes to make it clear that I'm not asking specifically or exclusively about stuff in the "Mature" category (AKA hentai). I'm ok with examples in that category, but I'm also completely fine with stuff outside. Basically, I'm looking for stuff where a guy's significant other or mutual crush is taken from him through some kind of deception or uncorrected misunderstanding. I've seen one or two hentai like this, where a girl is convinced that her boyfriend said or did something (like maybe revealing things about their relationship they promised to keep secret) that convinces her to leave him or something like that. The best example I know of in general though is a non-hentai series (one which doesn't actually reach the deception reveal until a point in the novel after the manga's end.

Spoiler

The series is called Ryuusa no Ori. In the story, the guy is in a school that focuses on various powers. The MC entered the school with his two childhood friends, one a boy and the other his girlfriend. He specifically entered to accompany his girlfriend as she pursued her dream, but while his childhood friends and his girlfriend in particular excelled and flourished, his power quickly hit a wall and he wound up an outcast, hated not only for his poor grades but for the audacity of the worst student to date the school's top. Then one day the hate skyrocketed as rumors spread that he was cheating on her, and soon after his girlfriend furiously dumped him after claiming to have caught him in the act. She soon after started dating the guy's other childhood friend.

It's later revealed that this other childhood friend had illusion powers, and had used these powers to make out with various girls while made to look like the main character, first to spread rumors and then to get the girlfriend to catch it. He'd wanted the girl for the longest time and couldn't stand that "his" girl was dating a loser like that. The ex-girlfriend was never willing to go beyond handholding though, and things come to a head when the guy finally snaps and tries to force things, at which point the main character manages to stop the situation and later both reveal the deception and ultimately defeat the bastard. Unfortunately by this point the guy had a large harem of potential love interests and a specific girl he was interested in, so even when some time later his ex comes to him and admits that she does still love him it's made clear that it'll take hard work for her to even gain a real position at the very bottom of the list of romantic candidates.

Have seen quite a few banished from the party fantasy stories have this topic.

 

[Oobaka-san]

Have seen quite a few banished from the party fantasy stories have this topic.

Please share if you can remember them.

 

[Mangamoz]

Please share if you can remember them.

Unfortunately I don't remember off the top of my head, since it is so common in banished stories. Sorry I could not be more helpful.

 

[Oobaka-san]

Unfortunately I don't remember off the top of my head, since it is so common in banished stories. Sorry I could not be more helpful.

That's fine. I've also wanted to find/make a list of "Banished" stories, because I love those but I'm pretty sure I've only seen part of them. For one thing, I know I haven't seen any where the whole thing was a result of deliberate deception, except maybe I Left My A-Rank Party, but that one didn't have an active love interest in the separated party and the one individual who does eventually become a love interest never bought the leader's attempts to diminish the MC's work. I'd love to see some like that, I particularly love "banished" stories that depart from the most standard path somehow.

Reminds me though that I'd heard somewhere about at least one story similar to that. I don't remember where I saw it discussed, but I remember even the person who posted about it didn't remember the name and never mentioned how things go within the story. The gist was that a guy was kicked out of his party and the other guy in the party seduced all the girls who had probably liked the MC before. He'd developed a horrible reputation largely due to lies the other guy spread about him, which apparently also played a huge role in the girls abandoning the MC for this guy. I recall he ended up telling his replacement that if any of the rumors are true, it's his tendency to frequent brothels, only the reason he did this was because the rest of the party were always loudly getting it on at night and he needed to get away from it.