Can you recommend some good NTR light novels for those who like complex relationships?

There is also 'The NTR World'. This novel stands out as it not only shows the ntr relationships but also delves deep into the psychological aspects of the characters. It makes the readers think about loyalty, love, and betrayal in different ways.

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.

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.

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.

There is also 'My Little Sister Can't Be This Cute'. This light novel explores the relationship between a brother and his sister. It has been quite successful and has also been adapted into an anime, with its unique take on the brother - sister dynamic.

'Attack on Titan' has an extremely complex and engaging plot. It's set in a world where humanity lives within walls to protect themselves from Titans. The story unfolds with many twists and turns as the characters try to uncover the secrets of the Titans and their own world. There are political intrigues, moral dilemmas, and intense action scenes.

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.