In some fanfictions, there's a plotline where Naruto and Hinata go on a secret mission together. This mission is something that only they can do because of their unique skills and the bond they share. It often involves them facing an unknown enemy and relying on each other more than ever, which deepens their relationship.
One interesting plotline could be where Hinata gets a new power and Naruto has to learn to work with her in a different way. For example, if Hinata got a power related to time - manipulation, it would create a whole new dynamic in their relationship and adventures.
Well, in some fanfics, there's a plotline where Hinata loses her memory and Naruto has to make her fall in love with him all over again. It's a classic but still very engaging. There are also stories where they are arranged to be married for political reasons at first, but then they actually fall in love for real during the process. And a really unique one is when Hinata becomes a super powerful ninja overnight and Naruto has to deal with his feelings of being a bit overshadowed while also being proud of her.
One interesting plotline could be Hinata becoming a powerful ninja in her own right and protecting Naruto instead of the other way around. For example, she could master a new and unique jutsu that saves Naruto from a powerful enemy.
A plotline could be that young Hinata gets lost in a mysterious forest near the Hidden Leaf Village. Naruto goes to find her, and during their time in the forest, they discover an ancient ninja artifact. They have to figure out how to use it or keep it safe from evil ninja who also want it. This adventure would test their skills and bring them closer together.
Another plotline might involve Naruto being a bit of a slacker in college at first, while Hinata is a studious student. Hinata then tries to help Naruto improve his grades, and in the process, they start to fall for each other. It could include study sessions filled with some awkward but cute moments.
In some Naruto and Hinata mate fanfictions, a great plotline is their parenting journey. They have to raise their children in a world full of challenges. Maybe their kids inherit unique abilities that draw unwanted attention. Naruto and Hinata have to teach their children the values of the Hidden Leaf, and at the same time, protect them from those who might want to use their powers for evil. This creates a lot of drama and also shows their growth as parents and as a couple.
A possible plotline is that the symbiote has its own agenda. It might try to influence Naruto in ways that are not good for the village. Hinata then has to figure out a way to separate the symbiote from Naruto without harming him. She could use her Byakugan to study the symbiote's connection to Naruto.
One interesting plotline could be Naruto slowly realizing his feelings for Hinata during a dangerous mission. Maybe they get separated from the group, and in that time of solitude and relying on each other, Naruto starts to see Hinata in a new light.
One interesting plotline could be Hinata secretly training harder to impress Naruto. She might be doing it on her own without anyone knowing, and then one day she surprises Naruto with her new skills.
One possible plotline could be Naruto and Hinata using their newfound god - like powers to protect the Hidden Leaf from a powerful, otherworldly threat. They could travel to different dimensions to gather allies or resources. Another could be them having to deal with the moral implications of being gods, like how much they should interfere in the lives of mortals.
One possible plotline could be a story where Naruto has to choose between two versions of Hinata, the original Hinata and a version from an alternate RTN (Road to Ninja) universe. Maybe in this fanfiction, the different Hinatas have unique abilities or personalities that make Naruto's choice more difficult.