One possible fanfiction plot could be during a village invasion. Naruto, with his unwavering sense of justice and his growing feelings for Hinata, shields her from an enemy's attack. He might get seriously injured, which then spurs Hinata to tap into her own hidden power to defend him in return. This kind of story can explore their bond deeper and show how they support each other in tough times.
A common element is the display of Naruto's heroism. He is always ready to sacrifice himself for Hinata. Another is the emotional reaction of Hinata when Naruto gets hurt. She usually becomes very determined to either avenge him or protect him further. Also, the other characters' reactions, like Naruto's friends coming to help after he's injured while protecting Hinata, are often included.
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.
The appeal lies in the potential for romantic development. In many fanfictions, Naruto protecting Hinata is a stepping stone to their romantic relationship. It creates a lot of tension and sweet moments. Naruto's heroic acts make Hinata admire him more, and Naruto starts to see Hinata in a new light. These stories can also show how their relationship affects the other characters in the Naruto world and the overall story arc of the fanfiction.
There could be a fanfiction where Naruto and Ino are exploring an ancient ruin. Unbeknownst to them, there are traps everywhere. When a huge boulder starts rolling towards Ino, Naruto pushes her out of the way. He gets crushed under the boulder's edge. Ino is desperate to save him. She manages to find some herbs in the ruin that have healing properties and uses her medical knowledge to treat Naruto's injuries. Meanwhile, Naruto's willpower also helps him in his recovery.
He would feel a deep sense of guilt, thinking that if he had been stronger or more aware, he could have saved her. Naruto might also start to cherish the memories he had with Hinata more, and this could change his personality a bit, making him more somber at times. He would probably vow to protect the things that Hinata held dear, like her family and the village.
One common type might be about Naruto accidentally hurting Hinata during a sparring session in the Hidden Leaf Village. Maybe his new jutsu goes a bit out of control and he ends up physically injuring her, which then leads to a story of his guilt and attempts to make it up to her.
A misunderstanding is also likely. Maybe Kiba overhears a conversation that he misinterprets. For instance, he might think Hinata is talking badly about him when in fact she is just discussing a general ninja problem. This could make him angry enough to hurt her, either with words or actions.
A good Naruto and Hinata hurt and comfort fanfiction should have a strong emotional core. It needs to really make the reader feel the pain that either Naruto or Hinata is going through. For example, if Naruto is the one in pain, the writer should describe his emotions in detail, like his feelings of loneliness or despair. Then, when it comes to the comfort part, it should be sincere. Hinata's actions to comfort Naruto should be believable and in - character, like using her gentle nature to soothe him.
Separation is also a common theme. Maybe Naruto has to leave the village for a long time, leaving Hinata behind. The distance and the lack of communication during this time can be a source of hurt for both of them. It often tests their relationship and loyalty.