A common scenario in such fanfictions is that Hinata sacrifices herself in a war - torn situation. For instance, in a great ninja war, Naruto is the key to victory but is targeted by the enemy's most powerful forces. Hinata, with her unwavering love for Naruto, jumps in front of a massive attack aimed at Naruto, knowing full well that it will cost her life. This selfless act then serves as a major turning point in the story, inspiring Naruto and his comrades to fight even harder.
One possible storyline could be in a dark AU (Alternate Universe). Maybe there's a powerful new enemy that targets Hinata specifically because of her connection to Naruto. This enemy could have some sort of vendetta against the Hyuga clan and sees Hinata as the key to their downfall. Naruto is then left to deal with the grief and also find a way to avenge her death, which could lead to a whole new arc of him exploring darker powers or making some difficult moral choices.
Well, in this fanfiction, an ending might be that Hinata, in her grief, leaves the village for a while to find herself. When she returns, she has become stronger and more confident. She then devotes her life to making the village a better place, just as Naruto would have wanted. Another ending could be that the whole village unites even more tightly after Naruto's death, with Hinata at the forefront of this unity, as she was the last person Naruto protected.
Another storyline could be that Naruto and Hinata are trying to raise their family while Naruto is Hokage. Hinata might be pregnant, and Naruto is worried about balancing his duties as Hokage with being a good father. He could get advice from his old friends like Shikamaru on how to manage his time better.
In a fanfiction, Naruto could be depressed because he feels he can't live up to the expectations of the village. Hinata, who has always admired him from afar, decides to step in. She shares her own insecurities with Naruto, making him feel less alone. This mutual understanding leads to them spending more time together. Hinata's gentle presence and unwavering belief in Naruto start to heal his depression, and they eventually fall in love.
One possible storyline could be that Naruto is so focused on his goal of becoming Hokage that he unintentionally ignores Hinata's feelings. He might be constantly training and involved in village affairs, not noticing Hinata's attempts to get closer. For example, Hinata could prepare a bento for him, but he's too busy to even accept it. Another could be that Naruto has some misunderstandings about Hinata and chooses to keep his distance, thinking she has some ulterior motives.
Perhaps in this fanfiction, Naruto is fatally injured in a fight during the Chunin Exams. He might sacrifice himself to save one of his friends. This would cause a great outpouring of grief from his friends and mentors. The village would also be in shock, and there could be a change in the power dynamics as his absence leaves a void.
One possible storyline could be that Naruto is framed for a serious crime within the Blood Prison. The corrupt prison system then subjects him to various forms of torture and unfair treatment, which eventually lead to his death. Maybe he was protecting someone else inside the prison and took the fall for a crime he didn't commit.
Perhaps there is a misunderstanding about Hinata's Byakugan abilities. It is thought that she and Naruto could use it in a dangerous way. This leads to their banishment. In their exile, they discover new powers within themselves that are not related to the Byakugan, which they then use to fight against the false accusations and return to the village.
One possible storyline is that Naruto and Hinata go on a diplomatic mission together. They represent Konoha in other villages, and during this journey, they deepen their understanding of each other and their love grows. They also use this opportunity to promote peace among the villages.
One possible storyline could be that Naruto's sister is being targeted by a powerful and vengeful enemy. Naruto, being the selfless hero he is, throws himself in front of a deadly attack meant for her. His death could then inspire his sister to take up his ideals and become a great ninja in her own right. Another idea is that there is a dangerous mission to protect a secret related to their family that only his sister can safeguard in the future. Naruto sacrifices himself to ensure she can complete this important task. And perhaps in his last moments, he passes on his most powerful jutsu or some important knowledge to his sister to help her in her future battles.