In a fanfiction where Naruto and Hinata join Kumo, one possibility is that they are sent there on a diplomatic mission that turns into a permanent stay. Naruto's charisma could win over the Kumo villagers, and Hinata's Byakugan would be a valuable asset. They could work together to reform some of Kumo's more archaic shinobi practices. Naruto could also train with the Kumo ninjas, sharing his sage mode knowledge, while Hinata could teach them about the Hyuga clan's gentle fist techniques.
In this fanfiction setting, their relationship would likely evolve in unique ways. Being in Kumo, they'd be in a different social environment. They might have to face some prejudice as outsiders, but this would make them cling to each other more. Naruto would be more protective of Hinata, and Hinata would be Naruto's source of strength. They'd also have more private time together, which could lead to a more romantic and intimate relationship.
Often, Naruto's status as a hero in the fanfiction world plays a big role. The Kumo ninjas might be a bit intimidated by him. He might start by making a grand entrance, shouting out his intentions to save Hinata. His reputation precedes him. Then he uses his Nine - Tails chakra, which gives him a significant power - up. He uses this enhanced power to fight off the Kumo ninjas who are holding Hinata captive and finally saves her.
One way could be a stealth mission. Shikamaru, with his high intelligence, could plan a strategy to infiltrate Kumo's hideout undetected. He could gather a small team of skilled ninja like Neji (if he were still alive in the fanfiction), Rock Lee, and Ino for mind - reading and communication. Then they could free Naruto and Hinata and escape before Kumo realizes what's happening.
If Naruto and Hinata were kidnapped by Kumo in fanfiction, it could lead to a major diplomatic crisis between the Hidden Leaf and Kumo. Naruto, being the hero of the Hidden Leaf, his kidnapping would enrage the villagers. Hinata, as his wife, her kidnapping would add to the urgency. Kumo might have kidnapped them for Naruto's power or to use Hinata as a hostage to gain some sort of leverage over the Hidden Leaf. The Hidden Leaf would then have to figure out a way to rescue them without starting a full - scale war.
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 a fanfiction where Naruto and Hinata join Orochimaru, one possibility is that they are forced into it. Maybe Orochimaru has some kind of leverage over Konoha that makes them comply. Naruto, being the head - strong character he is, would likely be constantly looking for a way to escape and take Hinata with him. Hinata, on the other hand, would probably be more reserved and observant, trying to find Orochimaru's weaknesses.
On the other hand, their relationship could also grow stronger. They would be relying on each other more in this new and dangerous situation. Naruto would be even more protective of Hinata, and Hinata would be a source of comfort for Naruto. They would have to communicate and trust each other more deeply to survive in Orochimaru's lair.
I haven't read this specific fanfic, so I can't summarize it directly. But generally, it might involve Naruto using his skills and determination to rescue Hinata from some sort of danger related to Kumo. Maybe Naruto has to fight against Kumo ninjas or overcome some tricky situations to ensure Hinata's safety.
Well, one potential partner could be Omoi. I know he's male, but in some fanfictions, gender - bending or same - sex relationships are explored. Omoi's unique personality, with his over - thinking and yet loyal nature, could create an interesting relationship with Naruto. However, if we stick to the more traditional female partners, Yugito Nii could also be a great choice. She was a jinchuriki, just like Naruto, and they could share a special bond based on that shared experience.