Well, in a fanfiction plot, Naruto could be training with Kurenai's team and he starts flirting with her as a way to show off in front of the younger ninjas. Kurenai is amused at first but then has to put a stop to it when it starts to become a distraction. However, Naruto doesn't give up easily and continues to find ways to flirt with her. This could lead to a series of comical events where Naruto tries different tactics like bringing her flowers or writing her love notes, all while Kurenai tries to maintain her professional composure.
One plotline could be that Naruto, in his typical bumbling way, tries to impress Kurenai with his new jutsu or skills, thinking it'll make her like him. He might accidentally make a fool of himself in the process but still manage to charm her with his determination. Another could be that Naruto misunderstands some advice about showing respect to elders and ends up flirting with Kurenai thinking it's the right thing to do.
Sakura could be one. She has always had a bit of a complex relationship with Naruto. In this harem fanfiction, she might see Naruto in a new light and become part of the harem. Another could be Hinata. Given her long - standing crush on Naruto, it would make sense for her to be in the story. Also, Tenten. She's a strong and independent ninja, and her interaction with Naruto could be an interesting addition to the harem scenario.
One possible plotline could be that Kurenai becomes possessive over Naruto due to seeing his potential. She might take it upon herself to train Naruto more rigorously than others, which could lead to Naruto growing stronger in unique ways. For example, she could teach him some of her genjutsu secrets, and as he masters them, their bond grows stronger, making her even more possessive of his growth and success.
Sakura could be a potential member. She has a long - standing relationship with Naruto and her skills as a medical ninja could be an asset to the group. Ino might also be part of it. Her mind - control jutsu and her strong personality could add an interesting dynamic. Tenten could be there too, with her weapon expertise. These characters already have connections to Naruto in the original story, and in a harem fanfiction, they could form a unique relationship with both Naruto and Kurenai.
One plotline could be Naruto having to deal with the expectations and legacy of Tobirama. Since Tobirama was a great shinobi and one of the founders, Naruto might feel pressured to live up to that. Another could be the discovery of this lineage leading to new enemies targeting him.
In a Naruto Kurenai pregnant fanfic, the plot could focus on the medical aspects as well. Given the unique world of Naruto with its own medical ninjutsu, it could show how the village's medical team takes care of Kurenai during her pregnancy. Maybe there are some complications that only the special ninja medicine can solve. Additionally, the plot could involve Kurenai training in a different way during her pregnancy to keep her skills sharp but also be safe for the baby. This could lead to her developing new techniques or modifying her old ones. And of course, there could be a sub - plot about the other characters' anticipation of the new addition to the village.
Obviously, Kurenai herself could be a central character in the harem. Also, Anko could be a potential member as she is associated with Kurenai and has her own unique personality. Hinata might also be involved as she has a crush on Naruto and could be drawn into this situation due to her connection with Naruto and the overall Naruto - Kurenai scenario.
One possible plotline could be that the fused Naruto - Madara entity has to face an ancient evil that neither of them could have defeated alone. The combined powers of Naruto's positive energy and Madara's combat skills make for a formidable force. They might also struggle with internal conflict as Naruto's values clash with Madara's more ruthless nature.
One plotline could be Naruto being transported to the Mandalorian universe. He has to learn the ways of the Mandalorians while still relying on his ninja skills. Another could be a Mandalorian coming to the Naruto world and Naruto teaming up with him, sharing their combat knowledge. For example, Naruto could teach the Mandalorian about chakra, and the Mandalorian could teach Naruto about their advanced weaponry.
One possible plotline could be Naruto growing up in a more nurturing environment. He might learn different jutsu from Kurenai and Anko. For example, he could pick up some of Kurenai's genjutsu skills, which would add a new dimension to his fighting abilities. Anko could also teach him some of her more unorthodox and aggressive fighting styles. Another aspect could be how Naruto's personality is influenced by these two strong female characters. He might become more in - touch with his emotions and develop better relationships with others in the village.
One common plotline could be Kurenai trying to keep Naruto away from certain dangerous missions. She might think he's not ready yet and be overly protective in the fanfiction.