Well, the plot could involve Fem Naruto bringing her ninja skills to the world of Highschool DxD. Maybe she uses her chakra control to perform amazing feats in the school, like acing physical education classes in a way that astonishes the devils and angels. She could also use her knowledge of ninjutsu to protect the shrine from any threats that come its way, whether they be from the supernatural elements of the DxD world or just normal human vandals.
In this fanfiction, the story could start with Fem Naruto being summoned or somehow transported to the Highschool DxD world and taking on the responsibility of the shrine. She would have to deal with the hormonal and often chaotic nature of high school students, both human and non - human. Her goal could be to not only keep the shrine in good shape but also to use it as a platform to spread the values of hard work and friendship that she learned in the Naruto world. She could get involved in the power struggles between the different factions, using her wits and skills to keep the balance and protect the innocent.
Fem Naruto's chakra - related abilities would be a huge factor. She could use her chakra to heal injured students, whether they are normal humans or supernatural beings. This would make her very popular and respected. In terms of the school's sports events, she could use her enhanced strength and agility to dominate. Her presence would also attract the attention of the different factions in the school. The devils might want to recruit her for her power, while the angels might be curious about her spiritual nature. This would create new alliances and rivalries within the school.
Well, it could be about Fem Naruto being in the Highschool DxD world and being a huge fan of Ophis. Maybe she tries to seek Ophis out for power or knowledge. For example, Fem Naruto, with her ninja skills, could navigate the complex world of Highschool DxD, which is full of devils, angels and other supernatural beings. She might see Ophis as a source of strength that could help her achieve her goals, whatever they may be in this new and strange world.
In a fanfiction where Naruto goes to Highschool DxD, he could introduce new concepts of chakra to the world. This would be really fascinating as the characters in DxD might try to incorporate it into their own powers. Naruto could also be a bit of a fish out of water, not fully understanding the social norms and hierarchies in Highschool DxD at first. But his kind heart would help him navigate through it all, and he'd end up changing the school environment in a positive way with his unique personality.
In these fanfictions, a frequent theme is adaptation. A female Naruto has to adapt to the very different world of High School DxD, which has its own rules about devils, angels, and other supernatural beings. Also, the theme of identity can be important. As she tries to fit in, she might question who she is in this new context. There may also be themes related to love and romance as she meets new and interesting characters.
The plot might revolve around Naruto's Juubi powers disrupting the balance in the Highschool DxD universe. This could lead to him having to either hide his powers or learn to control them in a new way. He might get involved in the Rating Games, using his ninja skills and Juubi - enhanced abilities to compete. And of course, there would be some sort of character development as he adapts to this new world.
Well, in a 'Naruto x Greyfia Highschool DxD' fanfiction, perhaps Naruto is a new transfer student in the Highschool DxD. Greyfia could be a popular student there. Naruto's positive and energetic attitude might attract Greyfia's attention. They could start off as friends and gradually develop a deeper relationship. Maybe they get involved in the supernatural battles of the DxD world together, with Naruto using his Rasengan and other jutsu while Greyfia uses her demonic powers. And as they spend more time together, they learn from each other's worlds and values.
One possible plot could be that Naruto is somehow transported to the Highschool DxD universe and meets Gabriel. They might team up to face a common threat that is endangering both the ninja world and the supernatural world of Highschool DxD. Naruto's unique skills as a ninja could be combined with Gabriel's angelic powers in an epic battle against evil forces.
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.
Well, a cool plot might involve Issei from Highschool DxD being sent to the Naruto world. He could learn ninjutsu there and then bring some of those skills back to his own world. He might befriend Naruto and they could work together to fight a common enemy that has somehow crossed between the two worlds, like an evil group that wants to take over both the ninja world and the world of devils and angels.
Maybe a story where the main characters from both universes have to team up to fight a common enemy. This enemy could be a powerful demon that has somehow found a way to cross over from another dimension. The Naruto characters could bring their combat skills and teamwork, while the Highschool DxD characters contribute their unique powers related to the devil and angel aspects.