Another plot could be that there is some sort of mind - control or genjutsu involved. An enemy might be using their powers to make Hinata act in a way that makes Naruto think she's cheating. In this case, Naruto would have to figure out the truth and save Hinata from this false situation while also dealing with his own feelings of betrayal.
One possible plotline could be that Naruto catches Hinata in a compromising situation that seems like cheating, but it's all a misunderstanding. Maybe she was helping a friend in secret and it looked bad. For example, she could be secretly training with another ninja to surprise Naruto with new skills, but he misinterprets it as something more inappropriate.
Maybe they inherit some unique abilities from their Hanyou side. Naruto could gain enhanced speed and Hinata could get some sort of shadow - based power. They then use these powers to face a new, powerful enemy that the regular ninja skills of the village can't handle. This would put them in the spotlight and they would have to prove that being Hanyou is an advantage rather than a curse.
One possible plotline could be that they go on a mission to a far - off land to retrieve a powerful and ancient artifact. Along the way, Hinata's Byakugan helps them detect hidden traps and enemies. Sasuke uses his Sharingan to analyze combat situations quickly, and Naruto with his Nine - Tails chakra provides the brute strength. They face many challenges together and in the process, their teamwork and understanding of each other deepens.
One possible plotline could be that Hinata is under some sort of mind - control. Maybe an enemy uses a jutsu on her that makes her see Naruto as a threat to the village in a false way. So, she kidnaps Naruto to stop him from doing something she believes is harmful. But as the story progresses, Naruto tries to break through to her real self and free her from the mind - control.
A plot could revolve around a dark force corrupting both Naruto and Hinata. This force might be an ancient evil that has been dormant for years. As Dark Naruto and Dark Hinata, they might target their former friends. Naruto could use his shadow clones in more menacing ways, and Hinata could use her Gentle Fist techniques to cause harm instead of protect. They could form an alliance with other outcasts or villains in the Naruto universe.
In this fanfic, it could be a fight in an alternate universe where Naruto and Hinata belong to rival clans. Their clans' long - standing feud forces them to fight each other. However, during the fight, they start to realize that the feud is baseless and they might even develop a new understanding of each other and their clans' history.
One possible plotline could be that Naruto finally realizes Hinata's long - standing love for him. He might start to actively pursue a relationship with her, showing his affection in ways he never did before. For example, he could take her on special dates around the Hidden Leaf Village, like to their favorite ramen shop but make it an exclusive date just for the two of them.
Well, perhaps they initially keep their relationship secret because Naruto is worried about how it will affect his status as a hero and Hinata is shy. They communicate through hidden notes and small gestures that only they understand. As the story progresses, they might face challenges like an enemy finding out about their relationship and trying to use it against 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.
One possible plotline could be that they are reborn into a different world altogether. Maybe a world where ninjas don't exist, and they have to figure out their new identities and how to get back to each other. They might have some hazy memories of their past lives which gradually come back as they grow older.
In fanfiction, if Hinata is portrayed as cheating, it could be for shock value. Writers sometimes want to create a big stir in the story.