Well, one possibility is that Naruto could make a deal with Kyuubi to gain more power in order to protect his village. He might offer something in return like sharing his chakra with the Kyuubi in a more controlled way.
In this fanfiction, Naruto might make a deal with Kyuubi to access some of its ancient knowledge. Maybe he wants to learn about the history of the ninja world that only Kyuubi knows. So, he bargains with it, perhaps by promising to free it one day under certain conditions.
One possible plot could be that Naruto makes a deal with the Shinigami to gain more power to defeat a powerful enemy. In exchange, he might offer his own lifespan or something precious to him. Maybe he needs this power to save his village from a new, overwhelming threat like an ancient evil that has awakened.
In this fanfiction, it could be that Fem Kyuubi has a deep connection with Naruto from the start. She may be able to enter his mind in a different way due to her femininity. So she uses this to her advantage, showing him things that make him see her as more than just the nine - tailed fox. Maybe she reveals secrets about the past that only she knows, which makes Naruto feel a special bond with her and she tries to make him hers.
Obviously Naruto and Kyuubi are the main characters. Naruto is the one making the deal, and Kyuubi is the one with whom the deal is being made.
One possible plot could be that Naruto, instead of being shunned in the village, is secretly taken in by the Kyuubi. The Kyuubi, seeing Naruto's loneliness, decides to raise him. Naruto would grow up learning unique skills from the Kyuubi, like advanced chakra control and perhaps some secret fox - related jutsu. This would make him a very different kind of ninja compared to the original Naruto in the series.
Well, one possibility could be a very creative and out - of - the - box plot where Naruto's unique bond with the Kyuubi leads to some sort of magical or spiritual connection that results in an unexpected pregnancy. But this is a very strange and far - fetched concept in the Naruto universe as it goes against the normal biological and story elements.
The plot of a 'naruto frees kyuubi fanfiction' might involve an external threat to the village. This threat is so great that Naruto realizes he needs the full power of the Kyuubi, not just the limited access he has through the seal. So, he starts to work on breaking the seal. Along the way, he has to face opposition from some in the village who fear the unleashed Kyuubi. But Naruto is determined. He finally frees the Kyuubi and together they defeat the external threat. After that, the Kyuubi decides to stay with Naruto as a friend and ally, seeing the true nature of the young ninja.
Well, perhaps in this fanfiction, the idea is that Naruto and the Kyuubi have a spiritual mating of sorts. It might mean that Naruto gains an even deeper understanding of the Kyuubi's nature. This could involve Naruto delving into the Kyuubi's memories and learning ancient secrets that help him not only in combat but also in his journey to bring peace to the ninja world. As a result, they become an even more formidable force combined.
Well, one possible plot development could be that at first Naruto is completely shocked. He has always seen the Kyuubi as a powerful and somewhat menacing force. But as the story progresses, he starts to understand the fem Kyuubi's perspective. Maybe she has been alone for a long time and sees Naruto's strength and kind heart as qualities that would make him a great mate. They could then start to develop a relationship where Naruto teaches her about the human world and she in turn shares her ancient knowledge with him.
One possible deal Naruto could make with Kami in fanfiction is to ask for the safety of his friends. Naruto values his comrades highly. So, he might bargain with Kami to ensure that they are protected from all the threats in the ninja world. Maybe he would promise to spread Kami's teachings or uphold a certain code of conduct in return.
Well, perhaps Naruto makes the deal to save his friends. He might trade his future or part of his soul to the devil in this fanfiction. And then he has to struggle with the consequences, like dealing with the devil's constant demands or trying to find a way to break the deal without losing everything.