One possible storyline could be that Deku sacrifices himself to save his friends from an all - powerful villain. He might use up all his power in a final, desperate attempt to defeat the enemy and protect those he loves.
Perhaps in a different version, Deku is poisoned by a new type of quirk - related toxin. His friends struggle to find a cure as he slowly succumbs to the poison, and in the end, he passes away, leaving a huge void in the Hero Academia world. This could lead to his friends vowing to avenge him and make the world a safer place in his memory.
There could be a fanfiction where Melissa and Deku are paired for a school project at U.A. High. They initially have different ideas but gradually learn to work together. During the project, they discover a hidden danger within the school that is related to a new type of quirk - erasing device. Together, they have to find out who is behind it and stop it before it affects all the students.
One common storyline is Deku having to balance his relationships with different female characters while also dealing with his hero training. For example, he might have to choose between going on a date with Ochaco and attending a special training session with Tsuyu. Another storyline could involve the girls in the harem teaming up to support Deku during a difficult battle, like when he faces a powerful villain. Sometimes, there are also stories where Deku initially doesn't realize he has a harem and the girls are all secretly vying for his attention in their own unique ways.
One popular storyline is where Deku and Uraraka go on a special training mission together. They face challenges that test their individual skills and also their relationship as friends. During this mission, they might have to rely on each other more than ever, which deepens their bond.
A third popular type of storyline might be a time - travel or alternate universe one. In this, Deku and Momo could be in a different world where their relationship is more developed from the start. Maybe they are partners in a hero agency right away, and they face challenges that are different from their normal world. This allows for a fresh take on their relationship and different ways to explore their characters.
One interesting storyline could be Deku finding himself in Wakanda through some sort of quirk accident. There, he meets Black Panther and they team up to fight a common enemy. Maybe a villain has stolen some important Wakandan technology and is using it to create chaos in both their worlds.
One popular storyline is where Uraraka and Deku go on a joint mission and during the mission, they have to rely on each other more than ever. Their relationship deepens as they face challenges together and Uraraka realizes new depths to Deku's determination. This often involves them using their quirks in creative ways to protect each other.
One idea for a Deku's Quirk fanfiction could be exploring what would happen if Deku's quirk manifested in a different way. For example, instead of having to gradually control One For All, he suddenly has full mastery from the start. This could lead to a very different story arc where he is immediately seen as a top - tier hero - in - training, causing envy and admiration in equal measure among his classmates.
Overusing his quirk is a common reason. Deku often pushes himself to the limit with One For All, and it can take a toll on his body. So in fanfiction, this could be a simple yet effective way to have him pass out.
One idea could be a fanfiction where Deku's quirk suddenly mutates. Instead of just having One For All, he starts to develop an additional power related to it, like the ability to share a fraction of One For All's power with his friends temporarily to boost their own quirks in a time of great need.
Well, 'Fallen Hope' is one that stands out. It explores Deku's descent into villainy in a very compelling way, with lots of plot twists and character development.