The kidnapping of Naruto by Rias Peerage could lead to a clash of cultures. Naruto comes from a world of ninjas and chakra, while Rias Peerage is part of a different supernatural world. This could cause a lot of misunderstandings and conflicts. For example, Naruto might not understand the social hierarchy within the Peerage and accidentally break some rules, which could either make his situation worse or give him an opportunity to negotiate his freedom. Also, the members of the Peerage might be divided in their opinions about Naruto. Some might see him as a threat and want to keep him locked up, while others might be curious about him and want to learn more about his powers.
In this fanfiction scenario, Naruto's unique abilities like his shadow clones and rasengan would be interesting to see in the context of being kidnapped by Rias Peerage. Maybe the Peerage kidnapped him because they saw his power and wanted to use it for their own purposes. Naruto might resist and start training in secret to get stronger and break free. He could also form an alliance with other characters who oppose Rias Peerage in their world.
One possible plot development could be Naruto initially fighting against the enslavement. He might use his ninja skills and chakra to resist the control of Rias Peerage. However, as the story progresses, he could start to understand their motives and form an unlikely alliance. For example, they might be trying to protect a greater good that Naruto didn't initially see.
One interesting plot development could be Naruto's unique fighting style integrating with the peerage's combat strategies. His shadow clone jutsu, for example, could be used in new and creative ways during battles against other supernatural groups. It might also lead to some comical moments as Naruto tries to adjust to the more formal and sometimes strict rules within Rias' peerage.
One possibility is that Naruto's friends launch a rescue mission. They would use their unique skills, like Sasuke's Sharingan or Sakura's medical ninjutsu combined with her combat skills, to find and save Naruto.
In a Naruto - Rias' peerage fanfiction, the story might focus on how Naruto's chakra system interacts with the devil's power. For example, his ability to sense chakra could be enhanced or changed when combined with devilish senses. Also, his relationship with the members of the peerage would be interesting. He could form strong bonds with some, like Kiba in Naruto's world, he might get along well with the werewolf in Rias' peerage.
It could also be due to a power struggle. Naruto is extremely powerful and independent. If Rias or other members of the peerage try to control or limit his power in some way, he would not tolerate it. His power is a part of who he is, and he's used to using it freely to protect others. So this could lead to his departure from the peerage.
Naruto would probably be angry at first. He's not the type to take being kidnapped lightly. He'd likely try to break free immediately using his strength and ninja techniques.
Naruto in Rias' peerage would be quite a sight. His orange jumpsuit would stand out among the devils. He might use his shadow clones to do multiple tasks within the peerage, like scouting or helping with household chores. His positive attitude would also have an impact on the often - serious devils in the peerage.
One possible plot development could be that Naruto's friends in Konoha realize he's missing and start a search mission. They might suspect Kumo immediately due to the history of tensions between the two villages. Meanwhile, in Kumo, Naruto could be held in a secret location. Some in Kumo might want to use him as a bargaining chip against Konoha, while others might see his potential and try to turn him into an asset for Kumo.
Yes, there might be such fanfictions out there. You can try searching on popular fanfiction websites like Fanfiction.net or Archive of Our Own. Just type in the relevant keywords and see what pops up.
One possible plot development could be that his friends immediately launch a rescue mission. They might use their unique skills and resources to track down the kidnappers. For example, if Obi - Wan is involved, he could use his Jedi mind tricks to interrogate possible informants in the underworld.