In some fanfictions, Izuku could have a summer internship with a top hero who has a very different fighting style from All Might. This would expose him to new techniques and ways of thinking about hero work. He might also have to deal with the hero's tough training regime. Another storyline could be that Izuku discovers an ancient quirk - related mystery during the summer. He teams up with his friends to solve it, and along the way, they face dangerous villains who are also after the secret. The last one could be Izuku having a summer where he tries to improve his non - quirk related skills, like his academic knowledge, which in turn helps him become a better hero in unexpected ways.
Well, a possible storyline is that Izuku gets involved in a summer - long competition. In this competition, he has to face off against other heroes - in - training from different schools. It would be a great opportunity for him to show off his growth and learn from his opponents. Maybe he meets a rival who has a quirk that directly counters his, forcing him to come up with new strategies. Another idea is that Izuku volunteers at a summer camp for kids with quirks. He helps them understand and control their powers, while also facing some internal struggles of his own. This could show his growth not just as a hero, but also as a person.
One great storyline could be Izuku spending his summer training with a new, secret mentor. This mentor could have a unique quirk that helps Izuku develop a new aspect of his power. For example, he might learn to control his One For All in a more precise way, like being able to focus it on just one part of his body for a short time. Another storyline could be Izuku going on a summer adventure with his classmates to a place full of rare quirks. There, they encounter various challenges and Izuku has to use his wits and strength to get them out of trouble. And finally, a story where Izuku discovers a long - lost relative during the summer who has some connection to his quirk and his family's past.
Definitely include All Might. He could be like a guiding figure for Izuku during the summer. He might give Izuku special summer training or pass on some important wisdom. Another character would be Iida. His strict sense of order and strong leadership skills could be useful in a summer group activity with Izuku. For example, they could be part of a team that has to organize a big hero - themed event. Also, consider adding Mei Hatsume. Her crazy inventions could play a role in Izuku's summer. She could create some new gear for him to use during his summer training or adventures.
A more romantic storyline could also be interesting. Picture Izuku realizing his feelings for Itsuka during a school event. He might be shy at first, but his friends could encourage him to pursue her. Meanwhile, Itsuka might be oblivious at first, but as Izuku starts to show his true feelings, she begins to see him in a new light.
A cool storyline could be that All Might and Izuku get trapped in a parallel universe where heroics are completely different. They have to find a way to get back while also learning from this new world. Another idea is that Izuku discovers a dark secret about All Might's past that makes him question their relationship but ultimately strengthens their bond as they work through it. Also, a story where All Might and Izuku team up with some of the villains to fight a greater evil that threatens the entire hero - villain ecosystem.
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.
A really cool storyline could be a time - travel one. Izuku and Ochako go back in time and meet their younger selves. They have to guide their younger selves to become better heroes without changing the future too much. Along the way, they see how their past actions and decisions led them to where they are now. And this experience also makes them realize how important they are to each other in their present lives.
One great example could be a fanfic where Izuku gains Wolverine's healing factor. This would completely change the dynamic of his battles in the My Hero Academia universe. He could be more reckless in combat, knowing he can quickly recover. Another example might involve Izuku learning Wolverine's combat style, which is very aggressive and up - close. This could add a new layer to his fighting techniques and make him a more formidable opponent.
One possible storyline could be how Female Izuku deals with her pregnancy while still trying to maintain her hero training. Maybe she has to find new ways to use her quirk safely for the sake of the baby.
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.
Another storyline could be a training arc where they help each other improve their skills. Shouto might teach Momo how to better handle high - pressure situations, while Momo could teach Shouto how to be more creative with his quirk usage. This could lead to a stronger bond between them as they grow both as individuals and as a team.
One popular overpowered Izuku fanfiction is 'One for All: Unlimited'. In this, Izuku has an extreme version of One for All that gives him near - godlike powers right from the start. He's able to take on villains with ease that would normally be a huge threat in the canon story.