Perhaps the plot could involve the child being sent to the future for some reason. In this future, the ninja world has changed a great deal. The child has to find a way to get back to their own time while also dealing with the new threats and powers in this future world. Along the way, they discover secrets about their parents that they never knew before and use this knowledge to grow stronger.
One possible plot could be that Naruto and Fuu's child is born with unique abilities. Maybe the child has a combination of Naruto's jinchuriki powers and Fuu's special jutsu. The story could follow the child's journey in the ninja world, facing challenges from enemies who are after the child's power. The child might also struggle to fit in as they are different from the other kids, but with the help of their parents' friends and allies, they learn to embrace their abilities and become a great ninja.
A plot could be centered around the child being kidnapped at a young age. Naruto and Fuu then go on a desperate quest to find their child. The story could show their different parenting styles coming into play during this difficult time. As they search, they encounter old enemies and make new allies. The child, while kidnapped, manages to learn some important skills and when reunited with their parents, they are stronger and more determined to protect their family and the ninja world.
One possible plot could be that they are on a mission together. During the mission, they face many challenges and have to rely on each other. As they grow closer through these shared experiences, a moment of intense emotion leads to a kiss.
One possible plot could be that Naruto and Fuu meet during a mission. Fuu is initially intrigued by Naruto's determination. As they spend more time together, they discover they share a similar sense of humor. Eventually, Naruto realizes his feelings for Fuu are more than just friendship and he proposes. Their wedding would be a grand affair, with all of Naruto's friends from Konoha attending.
In the 'naruto is an immortal child fanfiction', it could be that Naruto's immortality is a curse rather than a blessing. He is forever trapped in a child's body, unable to fully experience adult life. He might struggle with his identity as he is different from everyone else. He could then embark on a journey to find a way to either end his immortality or find a purpose for his eternal existence.
One possible plot could be that Naruto and Fuu meet again after a long time apart. Naruto has finally achieved peace in the Hidden Leaf, and Fuu has become a more confident and skilled kunoichi. They start to work together on a mission that requires them to pose as a married couple. As they spend time together, they realize they have real feelings for each other and decide to get married for real.
One possible plot could be that their political marriage is a means to unite two villages. Naruto, being a well - known and respected figure in his village, and Fuu coming from another. At first, they might be hesitant about the union as they don't really know each other. But as time passes, they start to understand each other's values and goals. They work together to bring about positive changes in both villages, like sharing ninja techniques and improving trade relations.
Well, one possible plot could be that Naruto and Fuu form an unexpected alliance during the Chunin Exams. They might face a particularly tough opponent together and through their combined skills, they manage to defeat the enemy. Naruto's determination and Fuu's unique abilities could complement each other.
In the fanfiction, their relationship could develop in a very passionate way. Since Naruto is a very emotional and energetic character, and Fuu has her own charm. When they decide to have a child, they would be super excited about the future. However, they would also face difficulties like any couple. There might be times when Naruto's duties as a ninja conflict with his family life, and Fuu would have to be understanding. And vice versa. Through these ups and downs, their love for each other and their child would keep their relationship strong.
One possible plot could be that Naruto, after achieving peace in the ninja world, realizes his feelings for both Fuu and Yugito. They start off as friends who have been through many battles together. As they grow closer, they decide to get married in a grand ceremony that unites the different ninja clans they are associated with. The story could also involve how they overcome the initial doubts and objections from their respective villages and families, as such a union between three people is quite unconventional in the ninja world.
Well, in such a fanfiction, Naruto might learn new jutsus from Fuu. Maybe they go on an adventure together to find a rare item or to save a village.
There could be a plotline centered around the cultural differences between their respective villages. Naruto, being from Konoha, Yugito from Kumogakure, and Fuu from Takigakure. They could start off not understanding each other very well, but as they work together on a project or mission, they begin to appreciate and learn from each other's cultures. This could also involve them sharing their unique jutsu and fighting styles, leading to a more unified and stronger bond between them. For example, they might learn that a certain technique from one village can be combined with a technique from another village to create a more powerful attack, and they have to figure out how to do this while also respecting the secrecy and traditions of their home villages.