for people who reads manhwa can you recommend me a manhwa with " real ntr" ? every " ntr " that i read are either 50 % not ntr ( i think manhwa fans have the same understanding for ntr as many people in this forum like girls that the mc have no feelings havin sex with other guys is automatic ntr ) or its only a subplot or only like 2-3 chapter. or maybe i only read the worse one and was unlucky do find a good one.
Though this definitely isn't 100% NTR, so kinda against your point, but still recommend "Queen Bee". It's mostly non-ntr (and still really good), but there's a somewhat lengthy arc where the mcs mother gets into an illicit relationship with the landlord, who is a main antagonist of the story. It caught me super off guard when I was reading it, and is actually portrayed in a pretty explicit and hot slow corruption, offset by the other storylines and the mcs obviousness. And before I start the 8th argument about this, yes it is NTR, because even if you don't consider a son/mother relationship to be netorare there is also a pathetic father who gets cucked.
Again, it's not the focus, not 100% NTR, but it is actually really good while it lasts.