One possibility could be that they turn evil due to a powerful enemy using some dark magic or jutsu on them. This could make them lose their sense of self and start causing chaos in the Hidden Leaf. For example, they might start attacking their former friends and allies, believing they are now enemies.
Their relationships with their friends would become extremely strained. Their former comrades would be shocked and saddened by their turn to evil. Naruto and Hinata would no longer be seen as the heroes they once were, and their friends would likely try to bring them back to the light, but it would be a difficult and dangerous task.
One possible plotline could be that Naruto is constantly shunned and mistreated by the village despite his efforts to protect it. This continuous rejection could gradually turn his heart cold and make him seek revenge. He might start using his powerful jutsu against those who once wronged him, like attacking the Hidden Leaf's leadership.
Sasuke could also become an antagonist in this scenario. If Naruto turns evil, Sasuke, who has his own sense of justice, would likely oppose Naruto. Their once - strong friendship would be shattered, and they would end up fighting each other, with Sasuke trying to stop Naruto from causing more destruction.
The contrast. Naruto is a character full of hope and determination, while an evil Hinata is the opposite. This creates a lot of tension. For example, when they interact, their different values will clash.
One possibility is that an evil entity takes over Hinata. In the fanfic, Naruto could be the only one who can sense that Hinata is not truly herself. He starts to investigate and discovers a plot that involves an ancient evil. The story could revolve around Naruto's attempts to free Hinata from this control and save the village from the impending danger that the evil Hinata might bring.
There could be a fanfic with this title, but the use of 'lemon' makes it a bit suspect. In the world of fanfiction, there are so many different takes on Naruto and Hinata's relationship. But if it's a 'lemon' fanfic, it's likely to contain adult - themed content. So, if you're looking for proper, non - inappropriate fanfics about them, you should look for ones that are rated for general audiences.
I'm not sure if it's popular. There are so many different types of fanfictions out there that it's hard to gauge the popularity of just this one. It might be popular among a small group of fans who are interested in exploring darker versions of Naruto and Hinata's relationship.
Hinata's family would also have to deal with the emotional aspect. They love Hinata in her normal state, and now they have to adjust to this new form. They might start to remember when Hinata was actually a baby before and all the hopes and dreams they had for her then. Some of the more conservative members of the family might be more hesitant to let Naruto be around her, but the more open - minded ones could see that Naruto's presence is actually good for her in this state. And they would all be united in their goal to get Hinata back to her normal self.
A fanfic about Naruto and Hinata's wedding could start with the preparations. Hinata would be shyly picking out her wedding dress with the help of Ino and Sakura. Naruto would be out with Kakashi, getting some last - minute advice on marriage. The day of the wedding arrives, and the whole Hidden Leaf Village is decorated. As they exchange vows, Naruto promises to always protect Hinata and their future family, and Hinata vows to support Naruto in all his dreams, ninja or otherwise.