One possible storyline could be the characters from My Hero Academia celebrating Christmas together at UA High. They could exchange gifts, with Deku getting a special All Might-themed item from his friends. Another idea is that the villains, for a change, have a truce during Christmas and experience the holiday spirit in their own way. Maybe Shigaraki gets a small moment of peace and reflects on his life.
One great storyline in My Hero Academia god fanfiction could be a god - like villain. This villain could have powers that seem almost unbeatable, like the ability to rewrite reality. It would create a huge challenge for the heroes, forcing them to think outside the box and work together in new ways. Maybe they'd have to find a way to nullify the villain's god - like powers.
There are also storylines that focus on the love lives of the characters. For example, a story might revolve around Ochaco's unrequited love for Deku and how she tries to win his heart in a more detailed and different way than in the original plot. These kinds of storylines add a new dimension to the characters and their relationships.
One popular storyline is about two female hero students falling in love while training together. They support each other in their growth as heroes and their relationship develops over time. Another common one is a story where a female villain and a female hero have a complex relationship that turns into a romantic one.
One popular storyline is the 'What if' scenarios. For example, what if the main character had a different quirk? Another is the character development outside the canon story, like exploring Bakugo's past more deeply. And there are also storylines where minor characters get more spotlight and their own heroic arcs.
One popular storyline could be about a character receiving a mysterious gift that unlocks a new quirk or power. For example, Midoriya might get a gift from an unknown source that gives him the ability to control time for a short period, adding a whole new dynamic to his battles and character development.
In some fanfictions, there might be a storyline focused on the origin of the 'Flame On' concept. It could be tied to an ancient civilization within the 'My Hero Academia' world. A group of young heroes stumbles upon this secret and has to protect it from villains who want to use it for their own evil purposes. They learn about the true power of the flame - on quirk and how it can change the balance of power in their world.
One popular storyline is Endeavor's redemption arc. Many fanfictions focus on him trying to make up for his past mistakes with his family. Another is his relationship with other heroes, like how he might collaborate with them in different ways. And some fanfictions explore his training methods and how he could pass on his skills to the next generation of heroes.
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 interesting storyline could be Izuku and Melissa teaming up to create a new support item. Since Melissa is great at making support items in the 'My Hero Academia' world, and Izuku has a deep understanding of how quirks work. They might combine their skills to make something that helps Izuku enhance his quirk in a new way.
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.