One possible plot could be a crossover where Naruto characters end up in the Highschool DxD world. Naruto and his friends could be mistaken for new, powerful devils or angels. They might have to adapt to the new school system, which includes things like the Rating Game. And along the way, they could make new friends and enemies, and Naruto's skills could be put to the test in a whole new way.
Another popular one is Shirone. Fanfiction often focuses on her journey, her unique abilities as a nekoshou, and how she interacts with the main characters. She has a certain charm that draws readers in, and her story can be developed in many different ways, such as her adapting to the high school life and dealing with her nekoshou identity.
These fanfictions expand the Highschool DxD universe by introducing new characters like male Nekoshou. For example, they can create new storylines around their powers and how they interact with the existing characters in the DxD world. It might be a male Nekoshou with a special ability that changes the power dynamics in the school.
Often, in these fanfictions, the male nekoshou is involved in a romantic plot. He could be in love with a female character from one of the main factions, like a devil girl. Their relationship would be filled with challenges, not just because of the different species but also due to the political and power - related issues in the Highschool DxD world. Also, a common storyline is him forming a group of friends or a team to participate in the various battles or competitions that take place in the school.
A plot could involve a nekoshou trying to fit into the high school environment while hiding their true nature from most students. But then they get involved in a magical tournament where they have to use their nekoshou abilities to win and prove themselves. Or perhaps a nekoshou is on a quest to find a lost nekoshou artifact that has a connection to their family's past in the Highschool DxD universe.
One great 'Highschool DxD Male Nekoshou' fanfiction is 'The Nekoshou's Bond'. It has an interesting plot where the male character forms a unique connection with a Nekoshou. The story is filled with action and some light - hearted moments. Another good one could be 'Nekoshou in Highschool DxD: A New Beginning' which explores a different take on how a Nekoshou fits into the Highschool DxD universe.
Meditation and self - reflection can play a crucial role. Since nekoshou powers are likely related to their inner nature, by meditating, the male nekoshou can better understand himself and his powers. He can also experiment with different forms or states of his nekoshou form. By pushing his limits in a controlled environment, like an abandoned part of the schoolyard, he can discover new aspects of his powers.
One idea could be that Naruto is somehow transported to the world of Highschool DxD. He could use his ninja skills and chakra in the new world, maybe even teach some of the characters there a thing or two about combat. For example, he could show Issei how to better control his power using chakra control techniques.
The storylines can be combined by creating a common threat. Suppose an enemy emerges that is interested in both the power of the Bijuu and the power sources in Highschool DxD. This would force the characters from both universes to team up. Also, the cultural differences between the Naruto world and the Highschool DxD world can be explored. Naruto could introduce concepts like ninja clans and shinobi training to the DxD characters, while they could introduce him to the complex social hierarchies and supernatural politics in their world.
The female characters from Highschool DxD, like Rias, would be intrigued by the unique personalities of the Naruto characters. Rias might see potential in some of them to join her peerage. And the Naruto girls, like Sakura, would be a bit shocked at first by the more revealing outfits and flirty nature of some of the Highschool DxD characters. But over time, they would bond over things like protecting their friends and the school. The Naruto boys would respect the power of the Highschool DxD devils and might even try to incorporate some of their fighting strategies into their own ninja combat styles.