One plot idea could be that Naruto is somehow transported to the world of Final Fantasy 13. There, he meets the characters and due to his unique abilities and charm, a harem starts to form around him. He could use his ninja skills to help the characters in their battles against the fal'Cie. Another idea is that the characters from Final Fantasy 13 are brought to the Naruto world. The different cultures and powers collide, and as the FF13 characters adjust, they are drawn to Naruto, creating a harem situation. The harem members could then team up with Naruto to protect both worlds from common threats.
In a harem fanfiction of Naruto and Final Fantasy 13, the story could start with Naruto being summoned by a powerful being in the FF13 world. The female characters there see him as a strange yet powerful ally. Lightning, for example, might be initially skeptical but gradually come to respect Naruto. Fang could be intrigued by his physical strength. As they interact more, a harem dynamic develops. Naruto's goal could be to find a way back home while also helping the FF13 characters with their fight against oppression. Along the way, romantic and comical situations can occur within the harem.
A great Naruto Final Fantasy fanfiction idea is to combine the magic systems. In this story, shinobi could learn to use Final Fantasy - style magic, like black magic for offensive spells and white magic for healing. Or perhaps a plot where the Akatsuki is after a powerful crystal from the Final Fantasy world that could grant them ultimate power. Also, a fanfic about a character from Naruto traveling through different worlds of Final Fantasy, facing the challenges and enemies in each world.
One idea could be exploring the backstories of the minor characters in more depth. For example, the story of the civilians in Cocoon who were affected by the events. Another could be a what - if scenario, like what if Lightning had made different choices at certain key moments. And a third could be focusing on the relationship between Fang and Vanille before they became l'Cie.
One idea could be that Naruto, with his ninja skills, gets transported to Starfire's universe. There, his unique abilities draw the attention of many characters, leading to the formation of an accidental harem. For example, his ability to make shadow clones might be seen as a very useful and cool power. Another plot could involve a common enemy that forces Naruto and Starfire, along with other characters who are part of the harem, to work together. This could lead to some interesting dynamics as they all come from different backgrounds and have different ways of fighting.
One idea could be that a Saiyan character somehow ends up in the Naruto universe and due to their unique powers, attracts a harem. For example, they might save a group of ninja from a powerful enemy using their super strength and speed, and the ninja, both male and female, become intrigued by this new and powerful being.
One idea could be that Naruto and Deadpool end up in a strange multiverse situation where they meet various female characters from their respective universes. They then have to team up to protect these females from a common enemy, and in the process, a harem - like dynamic forms as the female characters develop feelings for them.
The OC could be a descendant of a powerful clan that was thought to be extinct. Their presence in the Naruto world stirs up interest among many characters. The OC's knowledge of ancient jutsu and their kind heart draw in characters like Kakashi, Shikamaru, etc. into a harem. The OC then has to navigate the complex relationships while also trying to keep their clan's secrets safe.
Well, a plot could be that Naruto is a transfer student in a high - school that has a special ninja training program. The girls in the harem are all in different levels of the training. Hinata, being the shy one, tries to impress Naruto during training sessions. Ino, on the other hand, is more competitive and sees Naruto as a rival at first but then realizes her feelings. And Tenten could be the girl who helps Naruto with his weapon - based ninja skills in the high - school setting. They all end up in a harem - like situation around Naruto as he shows his growth and determination in the ninja high - school.
Maybe the island has some sort of magic that makes the women on it more attracted to Naruto. For example, it could be a chakra - related magic. As Naruto tries to figure out how to leave the island, he has to deal with the complex relationships that are developing among him and the female characters, like Sakura, Hinata, and Ino.
One plot idea could be that Naruto somehow gets transported to the world of Arrancars. He then starts to form relationships with different Arrancar characters, leading to a harem situation. Maybe he uses his ninja skills to protect them from other threats in their world, and in the process, they all fall for him.
Perhaps Naruto is on a mission near the sea and gets caught in a magical current that transports him to a hidden mermaid kingdom. In this kingdom, he is seen as a special being. The mermaids, being a matriarchal society, have different ranks of mermaids vying for his attention. He has to figure out how to get back home while also handling the mermaid harem drama.