Maybe there's a plot where the Avengers form a club in high school. It starts as a regular club, but they gradually discover that there are other - worldly threats related to the school. Like there could be a strange portal in the school basement that leads to another dimension. They then have to use their combined powers, which they've been hiding from the rest of the school, to close the portal and keep the school safe. And along the way, they learn about friendship and growing up in high school.
One idea could be that the Avengers are all new students in high school. Iron Man could be the super - smart tech - geek who's always building cool gadgets in the school's science lab. Captain America might be the new transfer student who has a hard time adjusting to modern high school life but quickly becomes popular for his sense of justice. Thor could be the jock - like character who's a bit clueless about normal high school stuff but is really good at sports. And Black Widow could be the mysterious girl who everyone is a bit afraid of but is actually really kind.
One idea could be that the Avengers are all students with different cliques. Iron Man could be the rich, popular kid who is also a genius in tech class. Captain America might be the new transfer student who tries to uphold old - fashioned values like honor and integrity in the high - school setting. Thor could be the exchange student from a far - off land, trying to fit in while also being super strong and a bit clueless about modern high - school norms.
Well, you could do a fanfiction where there's a mystery in the high school. For example, there are strange disappearances in the school and a group of students decide to investigate. It could also be about a love triangle between the most popular student, the nerd, and the athlete. And a third idea might be a story about a high school that has a magical element, like a hidden room that transports students to different worlds.
One idea could be a sports competition at the high school. The RWBY characters could be on different teams, like Ruby on the track team and Weiss in a fencing - related sport. They compete against other teams from different 'kingdoms' in the high school world, which adds an element of rivalry and teamwork.
One idea could be a group of students who discover they have hidden supernatural powers and must learn to control them while hiding from the school authorities. Another could be a love story between a human student and a supernatural being who is disguised as a regular student. And perhaps a plot where the school is actually a front for a secret supernatural society that uses the students for their own purposes.
Well, in 'high school dxd torture fanfiction', a plot could involve a character being physically tortured in a magical prison where the pain is amplified by dark magic. This could lead to the character having to find inner strength and allies to escape. Also, perhaps a character is tortured by being isolated from their friends and loved ones, which is a form of emotional torture.
A plot could revolve around a mystery in Akatsuki High School. There could be a series of strange events happening, like students disappearing or strange symbols appearing. The DxD characters would then have to use their skills and knowledge to solve the mystery, which could lead to uncovering a dark secret about the school's past.
A plot idea could be that some of the devils in High School DxD want to learn the secrets of chakra from Naruto. So they kidnap him to their world. Naruto then has to find a way to escape while also dealing with the political intrigue among the devils, angels, and fallen angels. Another idea is that Naruto's shadow clones could be mistaken for some new type of summoned creatures in the DxD world.
Another plot could involve a time - travel scenario. Maybe a character accidentally sends themselves and some of their friends back in time to when the first devils were created. They would have to navigate this ancient world while also trying not to change history too much, or else it could have dire consequences for their present.
One idea could be a high - school - aged Phoenix Wright taking on his first case in the school's mock trial club. He has to prove his classmate innocent of stealing a valuable school trophy. Another could be a love triangle between Miles Edgeworth, Phoenix, and a new character in the high - school setting, which adds drama to their already competitive relationship. And a third idea might be a group of students including the main Ace Attorney characters starting a detective club in high school and solving mysteries around the campus.
A really interesting plot would be if Percy's friends from Camp Half - Blood transfer to Goode High for some reason. They all have to adapt to the mortal school life while also dealing with the threats that follow Percy, like a vengeful demigod from an enemy camp who wants to expose Percy in the middle of his mortal school life.