I don't think there should be such a fanfic because it violates the basic relationship structure in Naruto. Naruto is a story about friendship, growth and protecting the village. If we have to answer, maybe in this so - called fanfic, some evil force forces them to be in a situation that leads to that result, but this is really a stretch and not something that should be promoted.
Definitely not. The Naruto series is about many positive values like loyalty, hard work and friendship. A fanfic with this kind of inappropriate plot goes against what the series stands for. It also disrespects the characters and the relationships that the creator has established. Fans usually prefer fanfics that are in line with the original spirit of the show, such as those that explore unshown battles or different character development paths within the acceptable boundaries.
Well, perhaps in this fanfic, the pregnancy could be a result of a special mission or some sort of magic that binds Kurenai to a character. And Naruto, being the hero he is, gets involved to help Kurenai understand and deal with the situation. He could also help her face the reactions of the village, which might be mixed since Kurenai is a respected shinobi.
Well, it could be about Naruto growing up under Kurenai's care and learning different jutsu from her. Maybe he also forms a close bond with her students like Hinata and Kiba.
I'm not sure if there is such specific fanfiction readily available. Fanfiction varies widely across different platforms, and this kind of plot might be considered quite unusual and not conform to the general tone of the Naruto series in many respects. Some fanfiction platforms have strict rules about appropriate content, and this might not pass those rules in a lot of cases.
A possible plot is that Naruto discovers a strange lemon - shaped artifact. Anko and Kurenai, being more experienced, help him figure out what it is. It turns out to be a key to an ancient ninja treasure. But they have to face various challenges and enemies who also want the treasure.
Well, it could be about Anko and Kurenai seeing Naruto's lonely situation and deciding to take him in. Maybe they start teaching him things that Jiraiya or Kakashi didn't. For example, Anko could teach him some of her more unorthodox ninja skills, and Kurenai could help him with his emotional intelligence and how to better understand others, especially in the context of his relationships with his peers.
In such a fanfic, perhaps Naruto discovers a new power or technique that Kurenai and Anko are in need of. Naruto then offers to teach them in exchange for their help in his own personal ninja goals. As they train together, they form a close-knit group and support each other through various challenges in the ninja world.
One possible plot could be Naruto learning new and unique jutsus from Kurenai. Since Kurenai is skilled in genjutsu, she could train Naruto in the ways of genjutsu, which he is not very good at initially. This would open up new storylines as Naruto struggles to master this different form of combat and uses his own creativity and determination to adapt genjutsu to his fighting style.
In this fanfic, the plot might also revolve around the relationships the child forms. They could have a special bond with Naruto's old friends like Sasuke and Sakura. The child might also struggle with the expectations placed on them by the village, as everyone would expect great things from the child of Naruto and Kurenai. This could lead to an internal conflict within the child as they try to find their own identity.
One possible plot could be that Kurenai has some sort of influence on Naruto's decision. Maybe she sees his potential in a different way than others. She could encourage him to join ANBU to better protect the village and its people. Naruto, being influenced by her words and perhaps having a sense of admiration for her, decides to take on the challenge of joining ANBU.