Yes, there might be. The 'fanfiction' world is vast and diverse. There are often crossovers that combine different popular franchises in unexpected ways. However, the quality and nature of such a fanfiction can vary greatly. Some might be really creative, while others could be a bit of a mess.
In some Highschool DxD and Naruto crossover fanfictions, Naruto might be depicted as a god - like figure. This could be due to his extremely powerful abilities in the Naruto universe, such as his vast chakra reserves, multiple jutsu, and his status as a hero in his own world. Writers may take these aspects and amplify them in the Highschool DxD setting, where the power levels and the concept of beings with god - like powers already exist. So, it's possible for Naruto to be seen as a god in such fanfictions.
If Naruto was a god in Highschool DxD fanfiction, he would likely change the power dynamics completely. His abilities could overpower many of the existing characters in the Highschool DxD universe. For instance, his speed and strength, enhanced by his god - like status, would make him a formidable opponent in battles. He might also attract a lot of attention, both from the good and the bad characters in the story, as his power would be a great asset or a threat.
A good plot idea could be that the OC Dragon God has to hide their true identity in the high school. They are there to find a certain magical item that is hidden in the school. As they search, they get involved with the main characters and have to deal with the normal high school drama as well as the supernatural threats that come their way.
One aspect of Highschool DxD x Male Sex God fanfiction is how it can re - imagine the harem aspect. Since he is a sex god, the way he approaches relationships with the female characters could be very different. Instead of the typical high school romance - like interactions, there could be a more mature and intense connection. He might also have a different view on loyalty and love compared to the regular characters in the Highschool DxD world.
It would probably be really interesting. Naruto's skills and abilities as a 'god' would likely disrupt the normal flow of the Highschool DxD world. Maybe he'd use his ninja techniques in battles against the devils and angels in that universe.
Rias could also be a popular character. She is a powerful devil and her leadership skills could be put to the test in a story that combines Highschool DxD with the God of War. Maybe she has to negotiate with the God of War characters or lead her group against a common enemy from that realm.
Maybe in this fanfiction, the Nine - Tails in Naruto is actually a super - powerful Sacred Gear that was sealed within Naruto. This Sacred Gear has its own consciousness like in DxD. The story could revolve around Naruto trying to master this new form of power that is a blend of his chakra and the Sacred Gear's abilities. He would have to deal with the various factions in the DxD world who are interested in his power.
God Ichigo could be a game - changer in a Highschool DxD fanfiction. He might act as a mediator between the different factions. Given his experience with different types of spiritual beings in the Bleach universe, he could bring a new perspective to the ongoing conflicts in DxD. For example, he could try to stop the senseless fighting between the devils and angels, which is a common theme in DxD.
If God Ichigo were in Highschool DxD fanfiction, the storyline could be affected in numerous ways. For one, Ichigo's combat skills would likely make him a powerful force in the DxD universe. His Zanpakuto abilities could give him an edge in battles against the devils, angels, and fallen angels in the series. He might also bring a different moral code, as he has his own sense of justice from his experiences in the Bleach universe. This could lead to interesting interactions with the characters in Highschool DxD, who have their own complex moral and power hierarchies.