Yes, there might be. The world of fanfiction is vast and diverse. With the popularity of both Harry Potter and the concept of Ryuji Jakkan (assuming it's a known or created concept), it's very likely that some fans have combined them in their creative works. However, it may not be as mainstream as some other Harry Potter fanfictions.
You could start by looking on Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms. Just use the search function and type in 'Harry Potter' and 'Ryuji Jakkan' to see if any relevant stories pop up.
A common theme is friendship - turned - love. They start as friends and gradually develop deeper romantic feelings. Another theme is mutual support. They help each other through tough times, like Haru being there for Ryuji when he has family issues or Ryuji giving Haru confidence in social situations.
It's not a common type. In the vast world of Harry Potter fanfiction, you'll find a lot more stories about Hogwarts during different eras, the relationships between the main trio, or the exploration of the wizarding world's politics. 'Breeder fanfiction' is more of a specialized sub - genre that only a small subset of fans might be interested in, as it delves into family - building and genetic - like concepts which are not as central to the general appeal of the Harry Potter series.
Hardly. When we think of popular Harry Potter fanfiction, we think of stories that add depth to the existing storylines, that give more backstories to characters, or that create new and exciting adventures in the wizarding world. The title 'harry potter fingered fanfiction' is so out of the ordinary and has a rather unseemly ring to it that it would not attract the masses of Harry Potter fans who are looking for well - crafted and thematically appropriate fanfiction.
Because 'Harry Potter' is an original and highly creative work with its own unique world - building, characters, and storylines. It's not derivative fanfiction. J.K. Rowling created the entire wizarding world from scratch, including Hogwarts, the Ministry of Magic, and all the spells and magical creatures. It has a distinct identity and has been developed in a way that sets it far apart from being a simple fan - made addition to an existing 'Potter' concept.
Well, it depends on the specific fanfiction. There are countless 'Harry Potter' fanfictions out there, and not all of them will portray Harry as an anarchist. However, some authors may take creative liberties and give Harry anarchist - like tendencies. This could be due to their own views on authority or a desire to show Harry breaking free from the more traditional and perhaps constricting elements of the wizarding society in the original series.
No. I've never really come across such a statement in the general Harry Potter fanfiction community. It seems rather strange and not a typical way to describe a fanfiction.
Another possible betrayer could be Dumbledore in some darker fanfictions. He might have a hidden agenda all along. He could be using Harry as a pawn in a much larger and more sinister game. And when Harry starts to figure things out and goes against Dumbledore's plans, Dumbledore betrays him to keep his own plans on track.
Definitely not. The core of the Harry Potter world is about magic, friendship, and fighting against evil. A 'slave' concept goes against the values that are central to the series. Fanfiction writers usually stay closer to the essence of the story while adding their own twists, but this is not a common or typical take. It might be a very niche and edgy form of fanfiction that only a small number of people might explore.
Probably not. It seems like a rather odd and specific concept that might not appeal to a large number of fans. Most fans are more interested in the main storylines, character relationships, and the magical elements as they are in the original series.