One great 'High School DxD Kiba Fanfiction' is 'Kiba's Ascent'. It really delves into his character development, showing his growth as a warrior and his relationships in a new light. The story has some exciting battles and also some heart - warming moments between Kiba and his friends.
In this type of fanfiction, the author might be trying to create a new narrative by bashing Kiba. It could be that they have a particular vision for how the Naruto and High School DxD worlds blend together. Maybe they think Kiba's character doesn't fit well in their idea of the crossover, so they use him as a sort of 'villain' or an obstacle for the other characters to overcome. This can add drama and a new layer of storytelling to the fan - made universe.
The popularity of 'High School DxD Kiba Fanfiction' is mainly due to the character of Kiba himself. He is a very likable character in the original series, and fans want to see more of his story. Fanfiction allows writers to explore different aspects of his character, like his past or potential future relationships.
One possible plot could be that Kiba is made out to be a bully in the High School DxD setting. He could be picking on characters from the DxD world, which angers the main characters from that series. This then leads to a conflict where the DxD characters team up with some Naruto characters who also don't like Kiba's behavior.
One idea could be Kiba getting involved in a secret magical tournament within the school. Another could be him forming a special alliance with an unexpected character to solve a mystery. Maybe he discovers a new power that changes his role in the school's supernatural hierarchy.
Kiba could be developed by exploring his emotional side more. For example, showing his insecurities about his place in the group. This would make him more relatable.
In a Naruto and High School DxD fanfiction, there could be a scenario where the protagonists of both stories meet in a neutral dimension. Issei from High School DxD might be intrigued by Naruto's ninja skills and determination. Naruto, in turn, could be curious about Issei's Sacred Gear. They could start training together, sharing their knowledge and skills, and ultimately have to face a common enemy that threatens both their worlds.