One possible plotline could be that Naruto, being older, has to take on the role of mentoring Kakashi in some new form of ninja art or strategy. Since he has more experience in this fanfiction, he passes on his knowledge.
In some fanfictions, Naruto could be older and have a family while Kakashi is still single. This family - centered plotline can show Naruto's more advanced life stage compared to Kakashi and how his older age affects his priorities and actions within the story.
A plotline could also involve Naruto, as the older one, being in a position to make important decisions for the village that Kakashi has to abide by. Maybe Naruto has a different vision for the future of the village due to his age - related wisdom.
A possible plotline could be that a new enemy targets Kakashi because of his distinct face features, believing there is some hidden power in his appearance. Naruto then has to protect Kakashi. Another plotline could be a magical spell that gets cast on Kakashi's face, changing his expressions uncontrollably, and Naruto tries to find a way to break the spell.
Well, in some fanfictions, Naruto might be shown as older by having him achieve higher ranks earlier. For example, he could become Hokage before Kakashi in the fan - made story. This would signify his more advanced position and potentially imply his older status in terms of experience and leadership.
One possible plotline could be that Kakashi is in a life - threatening situation during a battle against a powerful enemy. Naruto, seeing no other way to save him, uses a powerful and self - sacrificing jutsu that costs him his life. Another plotline might involve Naruto making a deal with some dark force to save Kakashi, but the price is his own life. Or perhaps in a mission gone wrong, Naruto takes a fatal blow meant for Kakashi.
Maybe in the fanfiction, Naruto gets injured really badly during a mission. While he is recovering, Kakashi stays by his side constantly, and Naruto realizes the deep care Kakashi has for him, which makes him start to call Kakashi dad. Then, Kakashi helps Naruto train in new ways to get stronger, sharing some of his own hidden techniques and experiences that he hasn't told others before.
One possible plotline could be that Kakashi sacrifices himself in a battle against a powerful new enemy. Maybe he uses his Sharingan to its fullest extent to protect the village, but the strain is too much and he succumbs to his injuries. Another could be that he is poisoned during a mission and despite the efforts of the medical ninja, he passes away, leaving Naruto and the others devastated. This would lead to Naruto being even more determined to achieve peace in Kakashi's memory.
Well, if there is a 'naruto kills kakashi fanfiction', it would be a very different take on the Naruto universe. It could be set in a world where Naruto has been corrupted by an evil force. This force could be manipulating Naruto's emotions and memories, making him think Kakashi is a threat. In the original series, they have a strong bond, so this would be a very controversial and unexpected plot.
One possible plotline could be that Hanare is in some kind of danger and Naruto and Kakashi team up to protect her. Maybe she has some special knowledge or ability that an enemy wants to get their hands on. Naruto's determination and Kakashi's experience would make for an interesting dynamic as they fight off the bad guys.
One possible plotline could be Naruto growing up with Kakashi's unique training methods. Since Kakashi is known for his strict and strategic training, Naruto might become an even more formidable ninja at a younger age. He could inherit Kakashi's Sharingan abilities in some creative way in this fanfiction world, which would give him a whole new set of skills to master.
Another plotline might be exploring Naruto's past more deeply. Maybe there are secrets about his parents that were never fully revealed in the original. In the fanfiction, he could discover something new about his father's time as Hokage or his mother's Uzumaki heritage that changes his perspective on his own powers and responsibilities.
Sure, there are likely fanfictions with this premise. Fanfiction thrives on taking established characters and putting them in unexpected situations. If Naruto were Kakashi's older brother, it would completely change the Naruto universe as we know it. It might mean that Naruto would have a different role in Kakashi's life, perhaps being more protective or having a say in his training. Also, it could impact the story arcs that involve Kakashi, as Naruto's presence as an older brother would add a whole new layer of complexity to his decisions and actions.