One idea could be that the academy instructor discovers Naruto has a unique and previously unknown ninja ability during a special training session. This could lead to a special mentoring relationship where the instructor helps Naruto develop this ability further.
A possible plot could involve the academy instructor believing Naruto is not cut out for the ninja life at first. However, through a series of events, Naruto proves his determination and potential. This could include Naruto saving the instructor's life during a mission gone wrong, which makes the instructor change their view and become one of Naruto's biggest supporters in the academy.
One idea could be that Naruto starts teaching at the academy to give back to the village. He discovers a young student with a lot of potential but who is also very shy. Naruto helps the student come out of their shell by sharing his own story of being an outcast. Another plot could be that Naruto tries to reform the academy's curriculum to include more real - world ninja experiences, which causes some conflict with the traditionalist instructors.
One idea could be a story about a new student at the ninja academy who has a unique and secret jutsu that no one else knows about. This student tries to keep it hidden while also trying to fit in with the other students like Naruto and Sasuke.
One idea could be that Naruto and Hinata are paired for a special project at the academy. They start off awkwardly but as they work together, they discover new things about each other and their feelings begin to grow. For example, Naruto realizes Hinata's hidden strength and Hinata sees Naruto's determination in a new light.
One plot idea could be Naruto joining the Police Academy in the Hidden Leaf. He might use his unique ninja skills to bring a new perspective to police work. For example, his shadow clone jutsu could be used for surveillance or crowd control. Another idea is that a character from the Police Academy discovers Naruto's secret ninja world and has to adapt to it while also trying to keep the peace in the village.
A great plot idea for a Naruto x Hinata academy fanfiction is that there's a new teacher at the academy who has a grudge against Naruto. Hinata stands up for him and they end up having to work together to prove Naruto's worth. Also, it could be about a competition at the academy where the winning pair gets a special prize. Naruto and Hinata team up and face various challenges, both physical and emotional, during the competition and their relationship blossoms through it.
One interesting plot could be the main character going back in time and using modern knowledge to change the outcome of some key battles in the Naruto universe. For example, they could introduce new jutsu combinations or strategies.
One idea could be a story where a new student arrives at Zodiac Academy with a mysterious power that disrupts the existing power balance among the houses. This could lead to unexpected alliances and rivalries.
One idea could be a new student arriving at Unicorn Academy with a special power that no one has seen before. This could lead to both envy and admiration among the other students.
One idea could be a new student arriving at Asagao Academy and trying to fit in with the different cliques. Another could be a mystery within the academy, like a secret society that the main character stumbles upon. Maybe a love triangle between students from different majors.
One idea could be a new student arriving at Mythos Academy with a mysterious power that no one has seen before. This power could attract the attention of both friends and foes, leading to various adventures as they try to figure out its origin and how to control it.