Perhaps a magical creature mistakes Naruto for its long - lost love who was known for being extremely charming. As a result, the creature bestows upon Naruto a temporary transformation that makes him sexy. This could lead to humorous situations where Naruto is confused by all the new attention he's getting. He might accidentally use this new - found allure to his advantage during a battle, distracting his opponents with his looks while also using his regular ninja skills.
One plot idea could be that Naruto loses his sight during a battle with a powerful new enemy who has a unique jutsu that affects his vision. He then has to rely on his other senses like hearing and smell, much like how real - blind people do. For example, he could learn to sense the chakra flow around him in a more detailed way to 'see' his opponents. Another idea is that his blindness is a result of a curse placed on him, and he has to go on a journey to find a cure while still facing his ninja duties.
A plot could be that a succubus is sent to the Naruto universe as part of a deal between dark forces. She targets Naruto because of his growing power. But as she gets closer to him, she starts to feel real emotions for him instead of just using him for power. This creates a conflict within her as she has to choose between her original mission and her new - found feelings.
One idea could be a crossover where a character with ice - make abilities from Fairy Tail ends up in the Naruto universe. They could use their ice - make skills to help the Naruto characters in battles, like creating ice barriers to protect the Hidden Leaf Village from an attack. Another plot could involve a Naruto character discovering they have an ice - make - like kekkei genkai and has to learn to control it while facing challenges from enemies who fear this new power.
In a fanfiction, it could be that Naruto is sent on a mission to a far - off land where the Hoshigaki clan once thrived. There, he discovers a hidden temple and upon entering, he is somehow merged with the spirit of a great Hoshigaki warrior. This causes him to start taking on the physical and mental characteristics of the Hoshigaki, and he has to learn to use these new aspects of himself to protect the land from an approaching darkness.
One idea could be that King Kong is somehow transported to the Naruto universe. He could be mistaken for a giant summon at first. Then, Naruto, with his friendly nature, tries to communicate with King Kong. Maybe they team up against a common enemy like a powerful new Akatsuki member who has the ability to control large beasts.
A plot could revolve around Naruto teaching the Katon Gouka Mekkyaku to a new generation of ninja. This could show his growth as a teacher and how he adapts the technique for different learning styles among the young ninja. He might also have to face some challenges when some of the students misuse the technique at first.
A Naruto and Shuri fanfiction could also focus on a training arc. Imagine Shuri wanting to learn some of Naruto's ninja skills, like how to move stealthily or how to use kunai effectively. Naruto, on the other hand, could be interested in learning about Wakandan science and technology from Shuri. They could train together in the Wakandan forests, with Naruto teaching Shuri basic ninja moves and Shuri teaching Naruto about the latest Wakandan inventions. This cross - training would not only strengthen their individual abilities but also create a deep bond between them.
One idea could be Naruto and his friends go on a mission during Halloween in a spooky forest. They encounter strange creatures that are actually the result of a jutsu gone wrong. Another could be that the Hidden Leaf Village holds a Halloween - themed ninja competition where they have to use their skills in a haunted - like setting. Or perhaps Naruto wakes up to find the village has been transformed into a Halloween - like world and he has to figure out how to reverse it.
You could also write a fanfiction about Naruto being raised by a different clan in the village. For example, if he was raised by the Uchiha clan, it would have a huge impact on his character development and relationships within the village.
One idea could be that Naruto somehow enters the world of Hatsune Miku. Maybe he's on a mission and a strange jutsu goes wrong, transporting him there. He could then team up with Miku to fight a new kind of threat that's affecting both her world and his. For example, an evil force that wants to silence Miku's music and steal the chakra from Naruto's world.