Perhaps in the 'naruto dies narusaku fanfic', Naruto sacrifices himself to save Sakura from a powerful enemy. Sakura, in her despair, starts to discover new aspects of Naruto she never fully realized when he was alive. She could then start a journey to find a way to bring him back, encountering many challenges along the way and meeting old friends and foes who either help or hinder her.
One possible plot could be that Naruto sacrifices himself to save the village from a powerful and ancient evil. He uses all his chakra in a last - ditch effort to seal away the threat forever, leaving the village in mourning but also in a state of safety. Another plot might involve Naruto being poisoned by an enemy who has infiltrated the village. Despite the efforts of Sakura and the others, they can't find a cure in time, and Naruto succumbs to the poison. A third idea could be that in a battle against a new, incredibly strong foe, Naruto is overpowered and killed, which then spurs the rest of the shinobi world to come together to avenge his death.
It could be a rogue ninja who was secretly plotting against Naruto all along. After Naruto's death, this antagonist could emerge and try to take over the village, seeing it as the perfect opportunity with the village in mourning and a bit disorganized. This ninja might have some personal vendetta against Naruto and now wants to make the village pay.
Maybe in the fanfic, Aunt May's death is the catalyst for Peter to take on a more serious and darker approach to fighting crime. He could start to question his no - killing rule more severely. For example, he might face a villain who was directly or indirectly responsible for Aunt May's death and be on the verge of crossing that line.
One possible plot could be that Ruby is facing an overwhelmingly powerful enemy alone. Despite her best efforts, she is mortally wounded in the battle and dies heroically. Another could be that she sacrifices herself to save her friends from a deadly trap or a powerful Grimm attack.
One possible plot could be about how her friends deal with the grief. They might gather to remember the good times they had with her, sharing stories and mementos.
One possible plot could be that Sasuke sacrifices himself to save the village. He might face an enemy too powerful for him alone, but he decides to hold them off long enough for Naruto and the others to escape. This would be a very tragic end for Sasuke as he has always been a complex and somewhat brooding character, and his death in this way would show his growth into a selfless hero.
One scenario might be related to a failed mission. Maybe Naruto is sent on a top - secret mission that is much more dangerous than anyone anticipated. He could be betrayed by someone he trusts during the mission, leading to his death. Or perhaps there are some unforeseen circumstances, like a strange and deadly curse that gets unleashed during the mission which he succumbs to.
One common theme is grief. Characters like Sakura, Sasuke, and the other villagers would experience intense grief over Naruto's death. Another theme could be legacy. People would start to think about the things Naruto left behind and how to continue his ideals.
One possible plot could be that Rarity contracts a rare and incurable disease in Equestria. Her friends, like Twilight Sparkle, would try everything to find a cure. But in the end, she passes away peacefully, leaving behind a legacy of her beautiful creations. This could show how the other ponies deal with grief and remember her through her works.
A 'Narusaku Naruto Dies' fanfiction could take many directions. One possibility is that it delves into the emotional turmoil of the characters. Sakura, who has a deep connection with Naruto, would have to deal with the loss not only as a friend but also as someone who might have had romantic feelings for him. The story could also explore how the world of shinobi changes without Naruto. His influence was huge, and his death could trigger political unrest or new alliances as other villages might see an opportunity with Konoha losing its most powerful shinobi.