Well, 'Kimi no Na wa' (Your Name) might also be considered in a way. It has elements that could be related to the theme. The story of two people swapping bodies and the complex emotions that follow can be seen as a form of exploring different relationships which is somewhat related to what might be in a kanojo ntr light novel.
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.
Typically, 'kanojo ntr light novel' often involves complex relationship dynamics. There are usually multiple characters with intertwined emotions.
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 '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 way to find 'fujoshi kanojo light novel' is to ask in relevant fan communities. There are often enthusiasts who can recommend some great ones based on their own reading experiences. They might be able to point you to novels that have engaging storylines and well - developed characters.
Well, the 'sakurasou pet no kanojo light novel' often has very interesting character development. The main characters grow and change throughout the story, which makes it engaging. For example, the relationship between the protagonist and his 'pet' girl is complex and full of twists and turns.
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.
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.
One could be 'Oregairu' which also delves into complex relationships in a school and social setting. Another might be 'Toradora!', as it has elements of relationship development between a boy and a girl.
One similar light novel could be 'Toradora!'. It also involves complex relationships between the main character, a girl he has a relationship with and other friends. The story is full of humorous and heart - warming moments.