Yes, there might be. There are a large number of fanfiction works out there that explore various crossovers and scenarios. Some fans might be interested in creating a story where Naruto and Akeno are guardians in a particular fictional setting. However, not all such fanfictions are well - known or easily accessible.
Perhaps they are guardians of a peaceful village that is suddenly under threat from an ancient evil. Naruto, with his experience in protecting his own village in the Naruto series, and Akeno, with her combat skills from High School DxD, must work together. They start by training the villagers to defend themselves, and then face the evil directly. Along the way, they might have to overcome differences in their fighting styles and personalities to succeed.
There could be. 'Lemon' in fanfiction often implies a more mature or romantic - often with a bit of spice - take on the relationship. But it's important to note that Naruto and Akeno are from different anime universes. Naruto is a ninja - filled world, while Akeno is from a world with devils and supernatural elements. So, the fanfictions might be really creative in merging these two different concepts, but also might not be to everyone's taste.
Often, a common theme is the clash and then the melding of their two different cultures. Naruto's world has the ninja villages, honor, and chakra, while Akeno's world has the devils, angels, and different power hierarchies. In the context of a 'lemon' fanfiction, there may also be themes of passion and desire that are more emphasized due to the nature of the 'lemon' genre, which often includes more romantic or sexual undertones.
One possible fanfiction could be about Naruto and Akeno meeting in a cross - over universe. Maybe Naruto is on a mission in Akeno's world and they end up teaming up. They could learn from each other's powers and fighting styles. For example, Naruto could show Akeno his Rasengan while Akeno could demonstrate her magic to Naruto.
In this fanfiction, Akeno is likely a character who has some sort of relationship with Naruto, either a friend or a love interest, who then does something to break his heart.
I'm not really into this type of fanfiction. However, generally, when Issei and Akeno are characters in fanfiction, they often bring out different aspects of their personalities. If it's a well - written one, it might explore their relationship in new and interesting ways, but hard lemon fanfiction might also involve inappropriate content that some people may not be comfortable with.
A possible plot could revolve around Naruto and Akeno discovering a common enemy. Naruto's experience in fighting powerful foes in his own world would be put to use. Together, they would combine their powers and strategies. Naruto could use his Rasengan while Akeno uses her lightning - based attacks. Their teamwork would be a central focus, and through this, they would strengthen their bond as siblings.
A fanfiction could explore the relationships between Naruto, Rias, and Akeno in a more character - driven way. For example, Naruto might be intrigued by the different social structures in their world compared to his. Rias could be fascinated by Naruto's growth from an outcast to a hero. Akeno, on the other hand, might be interested in Naruto's combat techniques. They could start as strangers but gradually develop deep friendships or even more complex relationships as the story progresses.
In this fanfiction scenario, Naruto's betrayal by Akeno could be due to a misunderstanding of their goals. Maybe Akeno has been influenced by some dark forces that made her turn against Naruto. It could also be that there is some hidden information that led to this sudden change in their relationship.