Well, it could be about Naruto taking on a leadership role in the Wave Country. Maybe he uses his ninja skills to bring peace and prosperity there, like dealing with local bandits or political unrest.
In a 'naruto ruler of wave fanfiction', it might focus on Naruto's journey to become a respected ruler in the Wave. It could include how he builds relationships with the people, forms alliances with other ninja villages to protect the Wave, and overcomes challenges such as lack of resources or internal disputes. He could also introduce new ninja training methods or systems to strengthen the Wave's defenses.