One possible plot could be that Naruto and Kakashi are in a fierce battle against a powerful enemy. Kakashi is about to be fatally attacked when Naruto jumps in front of him and takes the hit. As Naruto is dying, he might have some final words for Kakashi, perhaps about the importance of protecting the village and their friendship.
The plot could start with a mission gone wrong. Naruto and Kakashi are separated from the rest of their team and surrounded by a group of powerful and malevolent ninja. As the enemies close in, they target Kakashi who is already weakened. Naruto, seeing this, decides to sacrifice himself. His death could trigger a series of events, like a new power awakening within the village in his memory, or Kakashi going on a personal quest to avenge Naruto. It could also explore how the other characters in the Naruto universe react to Naruto's death, like Sasuke coming back to the village in shock and regret.
One possible plot could be that Fem Haku has some sort of unique ability or knowledge that is crucial for the safety of the Hidden Leaf Village. Naruto and Fem Haku are being pursued by an evil organization that wants to stop her from reaching the village. Along the way, they face numerous obstacles and battles. In a final showdown, Naruto realizes that the only way to ensure Fem Haku's survival and the safety of the village is to sacrifice himself. He gives his life to protect her, and Fem Haku then has to deal with the consequences of his death, like facing the villagers who may blame her, and also has to figure out how to use her abilities to protect the village on her own.
I'm not sure of a specific 'naruto dies saving kakashi fanfiction' off - hand. You could try searching on fanfiction - dedicated websites like Archive of Our Own or FanFiction.net.
One possible plot development could be that Sasuke is in a life - threatening situation, perhaps against an extremely powerful enemy. Naruto sacrifices himself to give Sasuke a chance to escape or defeat the foe. This would likely lead to Sasuke being filled with guilt and regret, and might change his whole outlook on life.
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.
Perhaps the village is invaded by a horde of powerful demons. Naruto, after a long and grueling battle, realizes that the only way to stop them is to seal them all away, like the way the Fourth Hokage sealed the Nine - Tails. But this sealing jutsu demands the life of the caster. Without hesitation, Naruto performs the jutsu, sacrificing himself to save the village he loves so much.
In such a fanfiction, one possible plot could be that Naruto faces an extremely powerful enemy who is about to kill Kakashi. Naruto, being the selfless hero he is, steps in and uses a powerful jutsu that requires sacrificing his own life to save Kakashi. This could lead to a great deal of mourning among the other characters, especially those close to Naruto like Sasuke and Sakura. They might then vow to carry on Naruto's will and protect the village even more fiercely in his memory.
In this fanfiction scenario, Naruto might die while saving Tsunade from a sneak attack. His death could cause a shift in the power dynamics of the village. Tsunade, filled with guilt and grief, could then take on a more reclusive role. Meanwhile, the younger generation, seeing Naruto's selfless act, would strive to uphold his ideals. They might start training harder and be more committed to protecting the village, just as Naruto did.
One possible plot could be that Naruto sacrifices himself to protect Boruto from a powerful new enemy. Maybe an ancient evil has been awakened and Boruto is in its direct path. Naruto, being the hero he is, steps in and uses all his power to stop it. His death then becomes a catalyst for Boruto's growth, driving him to become stronger and more determined to protect the village in Naruto's memory.
In such a fanfiction, one possible plot development could be that Naruto sacrifices himself during a major battle against an extremely powerful enemy. Maybe an enemy that has the power to destroy the entire Hidden Leaf Village. Naruto, being the hero he is, steps in to protect Hinata and in the process, takes a fatal blow meant for her. This would lead to great sorrow among the villagers, especially Hinata who would be heartbroken. She might then vow to carry on Naruto's will and protect the village in his memory.
The emotional impact would be far - reaching. The entire Hidden Leaf Village would mourn Naruto. He was the one who was supposed to bring change and hope. His friends like Shikamaru and Choji would feel a deep sense of sadness. They would question the fairness of the ninja world where such a selfless person like Naruto could die so young. Haku, in particular, would be haunted by Naruto's death. He might isolate himself at first, struggling with the fact that someone sacrificed themselves for him.