It's likely about the adventures of the Kamen Rider Dragon Knight. It might include battles against villains, the exploration of the Kamen Rider's powers, and the relationships with other characters in the story.
Character development is a big part. When you bring Naruto and the Kamen Riders together, you can see how they grow and change. Maybe Naruto becomes more tech - savvy from his interactions with the Kamen Riders, or a Kamen Rider learns the importance of teamwork like in Naruto's team. And the new relationships that form, like friendships or rivalries between the characters from the two different franchises, add depth and intrigue to the fanfic.
There's no official rule saying they can't. Since fanfiction is a product of fan creativity and is usually not part of the official franchise control. So, they can probably watch it if they come across it.
Ryuki is often very popular. He's the main character in the original series, so he's a natural focus in fanfiction. His journey and his growth as a rider make him an interesting character to write about.
Another interesting concept is a crossover with a fantasy world like Middle - earth from 'The Lord of the Rings'. Imagine Dragon Knight finding himself in Middle - earth and having to adapt to a world without his usual technology. He could form an alliance with the Fellowship to fight against a new evil that has the power to corrupt both their worlds.
You can try looking on fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a large collection of fan - made stories for various shows, including Kamen Rider Dragon Knight. Just use the search function and type in the relevant characters' names to see if there are any stories featuring Kit and Maya.
The Masked Knight's Spirit Knight's Infinite Soul Form first appeared in episode 34. This was the final form of the main character in the Japanese drama " Ghost the Kamen Rider." Infinite Soul was transformed by using Ghost Drive and Infinite Ghost Eye Soul. It used the Eye Gun Saber and Sunglass Saw Blade as its weapons, and strengthened its power with human emotions and infinite possibilities. The Unlimited Soul Form appeared in the 33rd episode as a glowing image and officially appeared in the 34th episode.
One idea could be exploring an alternate universe where the riders form different alliances. For example, some of the more antagonistic riders team up against a common threat that is far more powerful than any single rider. This could lead to interesting character development as they have to put aside their differences.