Most fanfics with such a premise are not likely to have a positive message as cheating is an unethical behavior. However, some might use it as a starting point to explore complex relationships and redemption arcs, but that's rare.
In a fanfic like this, it might start with Hinata feeling neglected by Naruto due to his busy Hokage duties. Kiba, being an old friend, is always around to offer support. But this is a very uncharacteristic plot as Hinata is deeply in love with Naruto in the original series. It would likely cause a lot of drama and conflict within the Konoha community.
Naruto would be extremely hurt. He loves Hinata deeply and to find out she cheated with Kiba would be a huge blow to him. He might go into a state of shock and disbelief at first.
One reason could be for the sake of creating drama. Fanfic writers often like to explore extreme scenarios that deviate from the original story to generate intense emotions and reactions from readers.
I'm not sure if there is a particularly popular 'hinata cheats on naruto with kiba fanfiction'. Fanfiction varies greatly in popularity and quality. Some might find such a plotline unappealing as it goes against the original relationships in the Naruto series. However, in the vast world of fanfiction, there could be some out there, but it's not something that is mainstream or widely known to be super popular.
There could be. Fanfiction often takes creative liberties with the original characters and storylines. While the Naruto series itself doesn't have this plotline for Kiba, in the world of fanfiction, where different interpretations and ideas are explored, it's possible that some writers have created stories where Kiba cheats. But it's important to note that not all fanfictions are of the same standard, and some might not be well - written or in line with the general spirit of the Naruto universe.
Perhaps in the story, there is a competition for a rare ninja item or a special mission opportunity. Kiba, being very competitive, sees Hinata as a threat. He tries to intimidate her by making fun of her skills in a very mean way. Hinata, who is already a bit shy and self - conscious, is deeply hurt by Kiba's actions. Naruto, on the other hand, witnesses this and stands up for Hinata, which then starts a whole new plot development in the fanfiction.
It's a rather strange concept. In the original Naruto story, Hinata has deep feelings for Naruto. The idea of her cheating with Kiba seems to go against the established character traits. It might be an interesting and controversial take in fanfiction, but it's not something that would be expected based on the canon.
I'm not sure if there is a specific 'hinata cheats on naruto fanfic' that meets those criteria. Fanfics can vary greatly in quality and content. Some might use this concept in a shock - value way, while others could try to build a more in - depth story around it. But it's also important to note that this is a rather controversial idea considering Hinata's loyalty in the main story.
There might be some fanfics out there with such a plot, but it's not a positive or common representation of the Naruto characters. In the Naruto series, Hinata has always admired Naruto from afar and they end up together. Sasuke has his own story arc that is mainly focused on his revenge and redemption. Changing their relationships in such a way in a fanfic seems like a distortion of the original story's essence.