One popular plotline could be them facing a new, powerful enemy together. Since they have a brother - like bond in this fanfiction concept, they would rely on each other's strengths. Naruto's determination and his ability to never give up would inspire Kakashi, while Kakashi's experience and wisdom would guide Naruto.
Their relationship makes their missions more collaborative. They trust each other completely. So, instead of following a strict hierarchical structure like in the normal ninja teams, they work as equals. This means they can make decisions faster and adapt to unexpected situations more easily.
One possible plot twist could be that they discover their brotherhood in a very unexpected way. For example, during a dangerous mission, Kakashi might get severely injured and in a moment of delirium, he reveals a long - hidden memory that points to their relation. Naruto, being shocked at first, then realizes it explains some of the strange feelings of connection he had towards Kakashi all along.
Well, a great plot could be that Kakashi, being Naruto's brother, decides to train Naruto in some super - secret jutsu that only their family knew. This would give Naruto an edge in battles and also strengthen their bond. Or perhaps they get into an argument over their different views on the village's future, but in the end, their brotherly love prevails. It could also be interesting if they both have to protect a precious family heirloom from villains who want to use it for evil.
If they were brothers in fanfiction, their relationship would become much more complex and multi - faceted. Kakashi, being the older brother, would feel a great sense of responsibility for Naruto. He would not only guide Naruto in his ninja training but also in his personal growth. Naruto, on the other hand, would look up to Kakashi not just as a powerful ninja but as his big brother. They would have inside jokes and a unique way of communicating that only siblings have. In times of trouble, they would rely on each other more instinctively. Their relationship would also have an impact on how others in the village view them. Some might envy their close bond, while others might respect them more for their family connection.
Well, there could be. Fanfiction writers love to explore unique and unexpected relationships. Since Naruto and Kakashi are both popular characters in the Naruto universe, some writers might come up with such a plot for the sake of creativity and exploring different storylines. But it's not a part of the official Naruto story.
Sasuke could be a popular character. He might be involved in the story in a way that either helps or hinders the situation where Naruto hurts Kakashi. For example, if Sasuke tries to stop Naruto from doing something stupid that would hurt Kakashi.
Another reason could be related to Kakashi's past actions. If there are some secrets or things Kakashi did in the past that come to light and Naruto doesn't like them, he could snap at Kakashi. Naruto has a strong sense of justice and loyalty, so if he feels betrayed or misled by Kakashi, his reaction could be to snap.
Kakashi might be initially surprised. But then, he would probably use it as a teaching moment for Naruto. He could say something like 'Naruto, stealing is not the way of a ninja.' And then give him a punishment like extra training.
One possible reason could be that Kakashi is preoccupied with other important matters in the village. Maybe he has some top - secret missions or tasks assigned by the Hokage that demand his full attention, leaving him with little time to focus on Naruto.