I'm not entirely sure specifically as there could be many 'dorei light novels' with different themes. Generally, light novels often cover a wide range of topics such as fantasy, adventure, and relationships. It might be about a story in a fictional world where there are unique characters and their experiences.
Without having read 'dorei kara no kitai novel', it's difficult to say for certain. However, if we break down the title, 'dorei' might be the central element and 'kara no kitai' could mean 'expectations from'. So it could be a story that focuses on the relationships and power dynamics where the expectations placed on 'dorei' play a significant role. It could be a historical - based story, or a fictional exploration of a society where such a concept exists.
The nin wolf might be a gift from a powerful ninja in the fanfiction. Maybe as a sign of Naruto's growing power or a new mission he has to undertake. It could also be a wild creature that Naruto tames during his travels.
Kimimaro could be an interesting missing nin character to explore in fanfiction. He was a tool for Orochimaru, but had his own internal struggles. You could write about his life before fully becoming a missing nin, his loyalty to Orochimaru despite his own deteriorating health, and what might have happened if he had broken free from Orochimaru's control. Another character could be Nagato. Before he became Pain, he had experiences that could be considered as leading towards a missing - nin - like existence. His views on peace and his use of the Akatsuki could be delved into in the context of a missing nin story.
The 'isekai maou to shoukan dorei novel' is likely to be a story full of fantasy elements. In isekai stories, the character is usually taken from our normal world to a strange and magical one. Here, with the mention of 'Maou' and'shoukan dorei', it seems that the plot might revolve around a powerful entity like a demon king or a lord who has summoned slaves. These slaves could have different abilities and purposes. The story could be about how this Maou uses these slaves to achieve his goals, whether it's conquering the new world, finding a way back home, or something else. There may also be other characters in the story who oppose or help the Maou, creating a web of complex relationships and exciting plot twists.
You can try looking for it in specialized light novel stores, either physical ones if they exist in your area or online stores that sell a wide variety of light novels.
Since I don't have specific information on 'sei dorei gakuen visual novel', it might be centered around the lives of students in a particular academy. It could deal with themes like friendship, love, and academic challenges. Maybe there are some unique elements to the school in the story, like special classes or a secret society among the students.
I'm not entirely sure as I haven't played it in detail. But generally, a visual novel often involves a story with characters, dialogues, and choices. It might be about the relationships and events within the setting of sei dorei gakuen 2.