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.
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.
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.
Naruto would probably be shocked at first. He might not have expected Hinata to leave him for Kiba. He could be angry at himself for not noticing Hinata's unhappiness sooner.
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.
Yes, there could be such fanfictions. Fanfiction allows for a wide range of creative interpretations. Some writers might deviate from the original characters' traits and create a story where Hinata cheats on Naruto. But this is not in line with the general perception of their relationship in the original series.
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.
Naruto's reaction would be complex. He would be devastated because his bond with Sasuke is so deep. However, he also trusts Sasuke to an extent. So, he would be torn between his immediate emotional response of anger and his long - standing faith in Sasuke. He might start to look for clues and evidence, and in the process, he could end up uncovering Kabuto's devious plan while also reaffirming his friendship with Sasuke. He would probably be more determined than ever to set things right and prove Sasuke's innocence if he is indeed innocent.
Naruto would probably be extremely hurt. He has always considered Hinata a friend and perhaps more. Betrayal from her would be a huge blow to his trusting nature. He might initially be in denial, not wanting to believe that Hinata could do such a thing.