One interesting storyline could be Naruto and Moka teaming up to fight a common enemy. Since Naruto has the power of the Kyuubi, he could bring his combat skills and chakra control, while Moka, with her vampire abilities, could use her super strength and unique vampire powers like her Rosario. They might face a powerful demon or an evil organization that threatens both their worlds.
A third storyline could be about Naruto helping Moka to control a new power she has acquired that is similar to the Kyuubi's. Naruto, having experience with the Kyuubi, could offer his insights and training methods. They could go on a journey together to find a way to master this power, facing various challenges along the way such as other vampires who are jealous of Moka's newfound strength or ninja clans who want to study this new power for their own purposes.
Another storyline could involve a love triangle between Naruto, Moka, and someone else. Maybe Naruto has feelings for Moka, but Moka is betrothed to another in her vampire world. This would create a lot of drama and tension as Naruto tries to win her over while also dealing with the Kyuubi's influence inside him. For example, the Kyuubi could either try to help Naruto in his pursuit because it's amused or try to sabotage it for its own reasons.
One interesting storyline could be Naruto and Moka teaming up to fight a powerful common enemy. They combine Naruto's ninja skills with Moka's unique abilities from her world. For example, Naruto could use his shadow clone jutsu while Moka uses her vampire strength to take on a horde of demons.
There could also be a storyline where Naruto and the Kyuubi team up to face a common enemy that neither of them could defeat alone. They have to rely on each other's strengths, with Naruto's determination and the Kyuubi's raw power. This adventure would bring them closer as friends and show the world that they are a force to be reckoned with.
Yes, there are some out there. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'kyuubi naruto x moka' and you'll likely find a variety of stories with different themes and plotlines.
One common theme is the exploration of their combined powers. Since Naruto has the power of the Kyuubi and Moka has her own unique vampire abilities, stories might focus on how they use their powers in battles or to protect each other.
There might be a 'naruto moka fanfiction' where Naruto ends up in Moka's world. He has to adapt to the rules of the vampire world while also teaching the vampires about the values of friendship and perseverance that he learned in his ninja world. This could lead to some really interesting cultural exchanges and battles.
One possible storyline could be that Naruto, upon accepting the Kyuubi, gains new powers and uses them to protect the village in a more efficient way. He might be able to control the Kyuubi's chakra better and combine it with his own jutsu for stronger attacks.
One popular storyline could be about Fem Naruto and Futa Kyuubi forming an unexpected alliance. They might start off as enemies but gradually come to understand each other's motives and end up fighting side by side against a common foe. For example, a new powerful enemy emerges in the Naruto universe that threatens both their existences. Through their shared experiences, they build a bond that changes the course of the story.
In a fanfic, the merging could also be due to a common threat. Suppose there is a dark force that wants to conquer both the ninja world and the vampire world. To fight this threat, Naruto and Moka's worlds start to merge gradually. This would result in unique alliances. For example, ninja and vampires might have to work together, with Naruto and Moka leading the way. They would need to find a way to combine their different fighting styles and powers, like Naruto's shadow clones and Moka's blood-based attacks.
One interesting plot could be Naruto finding himself in the world of Rosario + Vampire where he meets Moka and other characters. They go on adventures together, with Naruto's ninja skills and Moka's vampire powers combining in unique ways to face various threats.
In some 'Naruto adventure moka fanfiction', there could be a plot where Naruto has to adapt to Moka's school life. He might get into all sorts of comical situations while trying to keep his ninja skills a secret among normal students, and at the same time, they embark on small adventures within the school grounds.