Yes, it can be. The idea of crossing over Naruto and Inner Moka from Rosario + Vampire creates an interesting dynamic. Fans often like to explore different universes colliding in fanfiction. It allows for new storylines, character interactions, and romances that wouldn't exist in the original works. Some people are drawn to the contrast between Naruto's world of ninjas and Moka's vampire - filled world.
A fanfiction could also be based on Inner Moka being curious about Naruto's world. She decides to visit it, with Naruto as her guide. Along the way, they face various challenges, like dealing with people who are afraid of Inner Moka's vampiric nature. Naruto has to use his skills to protect her and show his world that she means no harm.
One idea could be a crossover where Naruto finds himself in the world of Inner Moka Lemon. He could team up with her to fight a common enemy that threatens both their worlds. Maybe an evil force that wants to steal Inner Moka Lemon's powers and use them to take over Naruto's world as well.
One common theme is the clash of their two worlds. Naruto comes from a world of ninjas and battles, while Inner Moka is from a world of vampires. Their different backgrounds often lead to interesting conflicts and resolutions in the fanfictions. Another theme is the discovery of love across different species. Since Naruto is human (sort of, with his special powers) and Inner Moka is a vampire, it's about how they overcome the differences to be together.
One idea could be a story where Naruto, as a vampire, accidentally stumbles into the world of Inner Moka. He initially struggles to adapt to the new and somewhat strange rules there. For example, he has to deal with the different power dynamics among the characters in that world. As he and Inner Moka interact more, they start to realize that they have more in common than they thought, like their strong wills and determination to protect those they care about.
In such a fanfiction, their love might develop gradually. Naruto could introduce Inner Moka to his world of ninjas, and she could show him the secrets of her vampire realm. Their relationship would be full of challenges, like dealing with the differences between their two species and the reactions of their respective friends. But their love could overcome these difficulties as they learn more about each other.
Naruto might be initially confused by Inner Moka Lemon's powers and appearance. But his friendly nature would make him quickly try to befriend her. He could ask her a lot of questions about her world and abilities.
A really interesting aspect of a Naruto and Inner Moka love fanfiction could be the cultural differences between their worlds. Naruto comes from a world of ninjas with a strong sense of honor and loyalty. Inner Moka is from a world of vampires with their own set of rules and traditions. Their love could bridge these two different cultures. They would have to learn to understand and respect each other's backgrounds. For instance, Naruto would need to understand Inner Moka's need for blood, and Inner Moka would need to understand Naruto's ninja code. This exploration of different cultures through their relationship could make for a very engaging fanfiction.
One great Inner Moka x Naruto fanfiction is 'A Cross - Over of Worlds'. It has an interesting plot where Inner Moka finds herself in the Naruto universe. The author does a great job of describing how she adapts to the new environment. Another one is 'Moka and Naruto's Adventure' which focuses on their team - up against some common enemies. It's full of action scenes.
You can try fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide variety of fanfictions, including ones related to Naruto and Inner Moka Lemon. Just use their search functions to look for specific stories.