The Kumo ninjas could also be working in a coordinated way. They might have a strategy to isolate Naruto and keep him away from Hinata. Naruto has to break through their formation. And if the Kumo ninjas have some sort of intel on Naruto's abilities, they could plan their attacks accordingly. So Naruto has to be constantly on his toes and come up with new tactics to overcome these challenges and save Hinata.
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.
Well, a plot twist could be that while Naruto is saving Hinata and Hanabi, he discovers a hidden power within Hinata that she didn't even know she had. Maybe it gets activated during the rescue and she actually helps Naruto in a way he didn't anticipate. And as for Hanabi, she could be the key to finding a secret passage or something that aids in their escape from the dangerous situation.
She would be devastated. Hinata has deep feelings for Naruto. His death would likely cause her to go into a state of shock and disbelief at first. She might blame herself for not being strong enough to protect him.
One plot idea could be that Hinata is captured by a powerful enemy during a mission. Naruto, using his newfound Sage Mode abilities, tracks her down. He battles through hordes of minions, and when he finally reaches Hinata, he has an epic showdown with the main villain to save her. Another could be in a post - war scenario where Hinata is in danger from a hidden threat within the village, and Naruto, with his status as a hero, uncovers the plot and saves her just in time.
One idea could be that Naruto discovers a powerful enemy has a plan to kidnap Ino and Hinata to use them as leverage against Konoha. Naruto uses his new Sage Mode abilities to track them down and engages in an epic battle to save them. Another could be that they are trapped in a dangerous genjutsu, and Naruto has to enter their minds to break the illusion and free them.
Perhaps Hinata's mom is in danger due to a powerful curse placed on the Hyuga clan. Naruto, with his strong sense of justice, decides to find a way to break the curse and save her. He might go on a journey to find a sage or an ancient scroll that holds the key to lifting the curse. Along the way, he faces many challenges but his determination to save Hinata's mom drives him forward.
In this fanfic, it could be that Hinata's mom is trapped in a different dimension. Naruto, through some kind of special power or training, manages to access that dimension. Once there, he has to face all kinds of strange creatures and challenges. He uses his quick thinking and combat skills to fight through them. As he gets closer to saving Hinata's mom, he discovers a secret about the dimension that is related to the origin of the ninja world, which adds more depth to the story.
Their relationship could deepen quickly. Naruto getting hurt for Hinata makes her realize just how much he cares for her. She might become more open and affectionate towards him, and Naruto, seeing her concern for him while he's injured, might also start to see her in a new light, as more than just a friend.
In another scenario, Naruto and Hinata are exploring an ancient ruin when traps are triggered. A large boulder is about to crush Hinata, and Naruto uses his body to stop it. He gets injured badly. Hinata then uses her skills in medical ninjutsu that she has been secretly practicing to treat Naruto's wounds as they wait for help to arrive.