In some fanfics, they might be partners in a special team. Working together to uncover secrets in the ninja world or to take on a powerful and dangerous enemy that no one else can defeat.
It could be that Kiba has been involved in something that Naruto considers wrong. For example, if Kiba endangered the safety of the village or their friends, Naruto, being the protector - type, would take action against him. Or perhaps there was a misunderstanding between them. Kiba might have been framed for something, and Naruto, believing the false information, tries to 'destroy' Kiba in the heat of the moment.
They could be related as adversaries with a strange connection. In fanfiction, Orochimaru might be after Naruto not just for the Nine - Tails, but also because Naruto has something that Orochimaru lost long ago. This creates a complex dynamic where they are constantly at odds, but there is also a deeper underlying connection.
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.
They could be related by a shared enemy. For example, if there was an ancient evil that both Naruto's clan (even if it was unknown to him) and Izuna's Uchiha clan had fought against in the past. This common foe could be the basis of a connection between them in fanfiction.
Perhaps Naruto has a newfound confidence or a change in his personality that makes Kiba and Issei twitchy. In the fanfic, if Naruto starts acting more recklessly or assertively than usual, it might make them nervous. It could also be that Naruto has some sort of connection to an enemy or a dark force that Kiba and Issei sense, and that's what is making them twitchy.
One possible motive could be jealousy. If Kiba were to gain more recognition in the village than Naruto in the fanfiction world, Naruto's insecurities could drive him to do something drastic like killing Kiba. But this is a huge departure from his usual self.
One possible reason could be that they had a past traumatic experience related to explosions. Maybe they witnessed an explosion that caused harm to their loved ones or themselves. Another reason might be that explosions in the 'Naruto' world are often associated with powerful and dangerous jutsus or attacks, and they are simply afraid of the destruction and chaos that explosions can bring.
One possible plotline could be that they are in a village or a world where there is a sudden increase in the use of explosive jutsus or weapons. Naruto, Kiba and Issei have to face their fear as they are constantly under the threat of these explosions. Maybe they start off by trying to avoid areas where explosions are likely to occur. For example, they might stay away from battlefields or places where ninja experiments with explosive substances are taking place. As the story progresses, they could be forced into situations where they have to confront their fear directly, like when their friends or loved ones are in danger in an explosion - ridden area. This would be a great opportunity for character development as they learn to overcome their fear for the sake of others.
Popular 'Naruto and Kiba' fanfics often focus on their unique bond. Since they are both ninjas in Konoha, their teamwork and how they complement each other's skills is a big draw. For example, Kiba's connection with his dog Akamaru and Naruto's ability to use shadow clones can create some amazing combat strategies in the stories.
I really like the 'Kiba Naruto Fanfic' titled 'Kiba's New Power'. In this story, Kiba discovers a new and unexpected power within himself, which changes his role in the team. It's exciting to see how he uses this power to help his friends and face the enemies. There's also 'Kiba in the Land of Shadows', which takes Kiba on a journey to a spooky and dangerous land. It's full of action and mystery as he tries to survive and complete his mission there. And don't forget about 'Kiba and Akamaru's Bond Strengthened', which explores the deepening relationship between Kiba and his faithful companion Akamaru.