One of the good NTR novels could be 'Your Lie in April'. It beautifully portrays complex relationships and emotions. The story is mainly about a young pianist and his interactions with different characters, which involves some elements of unrequited love and complex emotional entanglements that can be considered in the realm of NTR in a more emotional and psychological sense.
I also think 'Clannad' can be considered in this regard. The story is filled with multiple love stories and relationship developments. There are situations where the characters' relationships face unexpected twists and turns, which can be related to the concept of NTR in the sense of the disruption and redirection of the characters' feelings towards each other.
One popular Western NTR visual novel is 'Our Life: Beginnings & Always'. It has an engaging story and well - developed characters. The art style is also quite appealing.
Well, 'Fate/stay night' is also a great choice among translated visual novels. It has been translated quite well and has elements that can be related to the ntr concept in some storylines. Also, 'Sakura Spirit' has a unique story and the translation makes it accessible to a wider audience.
The 'Haruhi Suzumiya' series also has some elements that might be related to relationship exploration. The story is centered around Haruhi and her friends, and there are various interactions and relationship developments among the characters that could be considered in the context of complex relationship V novels.
One example could be 'Jane Eyre'. In this novel, there are elements that can be related to a form of 'revenge' in the sense that Jane, after facing hardships and mistreatment, stands up for herself and finds her own path and happiness, which is a kind of victory over those who wronged her in a way.
Sure. 'Kanon' is a popular visual novel that has some elements that might be relevant. It has deep character development and emotional storylines. And 'Clannad' as well. These visual novels have various relationship - based story arcs which might touch on some of the themes in eroge ntr visual novels to a certain extent, while still being more accessible and family - friendly in general.
Well, 'My Next Life as a Villainess: All Routes Lead to Doom!' can also be considered in a way. The main character has to navigate through a world with certain systems in place that can be seen as related to the ntr concept, especially when it comes to relationships and how they develop or are disrupted.
One popular 'kanojo ntr light novel' could be 'Ore no Kanojo ga Konna ni Kawaii Wake ga Nai' (My Girlfriend Is So Cute It's Unreal). It has an interesting plot with complex relationships.
I can't really recommend 'naruto ntr fanfic' as the concept often goes against the positive and ethical values of the Naruto series. Instead, you could try searching for fanfics that explore Naruto's training with Jiraiya in more depth, or those that focus on the relationships between the Konoha 11 in a positive way.
One popular 'isekai ntr light novel' is 'The Rising of the Shield Hero'. It has elements of isekai where the main character is transported to another world. Although not strictly pure 'ntr' in the extreme sense, there are some relationship - related plot developments that might be related to the concept.
Another great one could be 'Overlord'. It involves a powerful character being trapped in a game - like isekai world. There are complex relationships and power dynamics that can be considered in the context of ntr elements in a rather unique way as different factions interact.