It could be an old enemy of Kushina's who was thought to be dead but has now returned. Maybe someone from her days in the Uzumaki clan who has a vendetta against her and now sees Naruto as an obstacle too.
Perhaps in this fanfiction, Naruto discovers a hidden ability that was passed down from Kushina. They go on a journey together to learn more about this power and how to control it. This would involve a lot of training sessions and some heart - to - heart conversations between mother and son.
A fanfiction crossover between Naruto, Kushina and Fairy Tail could be really interesting. It could involve the unique powers from Naruto and Kushina's world combined with the magic in Fairy Tail. For example, Kushina's chakra chains could interact with Fairy Tail's ice - make magic in some creative ways. Maybe Naruto's shadow clones could be used in a joint mission with Fairy Tail wizards.
For Naruto, you could show his growth in terms of his leadership skills when he's with Naruko and Kushina. He could learn to be more patient and understanding, especially when Naruko might have a different approach to things. For Naruko, her character could be developed by showing her struggle to be recognized in a world where Naruto already has a reputation. Kushina could be developed by exploring her motherly side more deeply, as she interacts with both Naruto and Naruko.
One possible reason could be a misunderstanding. Maybe Minato thought Kushina had done something to endanger Naruto when in fact she hadn't. In the heat of the moment, he lost his temper and slapped her.
The Naruto x Kushina romance in fanfiction can be quite interesting. Fanfic writers might focus on the idea of Kushina seeing Naruto grow up and be proud of him. They could have tender moments like Kushina helping Naruto with his studies or training. There could also be a plot where they face challenges together, like protecting the village from a new threat. This kind of fanfiction allows fans to imagine a different family dynamic for Naruto that he was deprived of in the original story.
Minato might be a common character. Since he is Kushina's husband in the original story, his presence can add an interesting dynamic. Also, Jiraiya could be there. He was Naruto's mentor and his interactions with the harem situation could be quite humorous.
In such a fanfiction, the relationship between Naruto and Kushina would be one of mother - son love and mutual respect. Kushina would be protective of Naruto and proud of the man he has become. Naruto would look up to Kushina and value her wisdom. With Hinata, Naruto's relationship would be that of a loving couple. Hinata would support Naruto in all his endeavors. When it comes to Kushina and Hinata, Kushina would likely see Hinata as a worthy partner for Naruto and Hinata would respect Kushina for being Naruto's mother and a strong kunoichi.
Perhaps in this fanfiction, Naruto, abandoned by Kushina, ends up in a world where ninjas don't exist in the same way. He has to adapt to a completely different lifestyle. But he still holds onto his ninja spirit. As he grows, he discovers secrets about his family that Kushina never told him and that knowledge helps him become stronger and more self - assured.
Well, one possible plot could be that in a strange twist of time and space, Kushina is brought back to life during Naruto's time. They could go on an adventure together, with Kushina using her skills to protect Naruto and also teaching him some of the Uzumaki clan secrets. But this would be a non - lemon version, focusing more on their family bond and growth as characters.