A third idea could be a time - travel harem fanfiction. The main character, perhaps an older version of a well - known character from the future, travels back in time to the present day in the My Hero Academia world. Their future knowledge and different personality traits make them stand out, and characters like Kirishima, Kaminari, and Sero are all drawn to them, creating a harem situation. This would also allow for some interesting plotlines involving changing the future and dealing with the knowledge of what's to come.
Another interesting concept is to set the fanfiction in an alternate universe where the roles are reversed. So, instead of the male characters being the main focus, it could be the female characters who form a harem around a male character. For instance, Ochaco, Tsuyu, and Momo could all be vying for the affection of a male student with a really powerful and mysterious quirk. This would give a fresh take on the harem concept within the My Hero Academia universe.
One idea could be to focus on a new student at UA who has a unique quirk that attracts the attention of multiple characters. For example, a quirk that allows the user to see into people's true emotions. This could lead to some interesting interactions with characters like Deku, Bakugo, and Todoroki. They might all be intrigued by this new student in different ways, and a harem dynamic could develop as they compete for the new student's attention.
Perhaps in this genderbend harem fanfic, the female Deku is a new transfer student to a school dominated by male students who are all attracted to her kind - hearted and heroic nature. And they all compete to be her sidekick in battles.
Perhaps the OC has a hidden past related to a villain organization, and the harem members are initially suspicious but as they get to know the OC better, they realize there's more to the story. This could create a lot of drama and conflict as the OC tries to prove their loyalty while also dealing with their growing feelings for the harem members.
A cool concept for My Hero Academia fanfiction is to have a time - travel plot. A character could go back in time and change a significant event in the My Hero Academia world. This could lead to a completely different storyline. Or you could write a story centered around a villain redemption arc. For instance, giving a more in - depth look at how a villain like Shigaraki could potentially be redeemed and how the heroes would react to that. Additionally, fanfiction about a tournament between different hero agencies could be really exciting.
One idea could be a crossover where the heroes from My Hero Academia are transported to the Marvel universe. They could team up with the Avengers to fight a common enemy, like a powerful villain who has the ability to steal quirks and superpowers. For example, imagine Deku working alongside Spider - Man, learning new ways to use his quirk from him.
One idea could be a crossover with the Naruto universe. The characters from My Hero Academia could interact with Naruto characters. For example, Deku might learn some new fighting techniques from Naruto. Another idea is a crossover with the Harry Potter world. The students at U.A. could visit Hogwarts and experience magic, while the Hogwarts students could learn about quirks.
Well, you could focus on the social aspects in a My Hero Academia college fanfiction. Maybe some characters struggle to fit in because their quirks are considered odd or too powerful. Or perhaps there are rivalries between different departments, like the combat - focused department and the support department. You could also write about a college event, like a hero - themed sports festival, where the characters show off their quirks in new and exciting ways.
One idea could be that the Autobots and Decepticons arrive in the My Hero Academia world. The heroes could be initially confused by these giant robots with strange powers. For example, Izuku Midoriya might try to understand their technology and powers in relation to his own Quirk. He could see the Autobots' ability to transform as a super - power similar to a Quirk and try to learn from them. The villains in My Hero Academia might team up with the Decepticons for their own evil purposes, leading to epic battles between the combined forces of heroes and Autobots against the villains and Decepticons.
One idea could be a crossover where the characters from My Hero Academia end up in the Sekirei world. They might have to adapt to the rules there, like the Sekirei Plan. For example, Midoriya could befriend some of the Sekirei and try to help them without using their power in a harmful way. Another idea is to have a Sekirei gain a Quirk-like ability, which would be very unique in the Sekirei world and cause all sorts of interesting situations. Maybe a Sekirei with a strength - enhancing Quirk could be a great asset in the Sekirei battles.
One idea could be a story where Eraserhead and Ms. Joke team up on a particularly difficult mission. Maybe they have to infiltrate a villain's lair and their different quirks work in harmony to overcome various obstacles.
One idea could be a story where a character's quirk goes horribly wrong in a very creepy way. For example, if Deku's One For All started to consume his mind instead of empower him, making him lose his sense of self and become a menacing figure. Another could be about a hidden villain within UA who uses their quirk to create disturbing illusions that drive students mad. And a third idea might be a fanfiction where the Nomu are given a more sinister backstory, like they were once normal people whose quirks were brutally experimented on, turning them into the terrifying creatures they are now.