Maybe in the fanfic, Izuku's healing power is a secret at first. So there could be a plot where he has to hide it from his teachers and classmates while still using it to help in small, covert ways. This creates a sense of mystery and tension as he tries to keep his power under wraps.
One interesting plot could be Izuku using his healing ability to save his classmates during a really tough battle. For example, when they face a powerful villain who almost kills one of them, Izuku steps in and heals the near - fatal injury, turning the tide of the battle. It adds a new dynamic to the story as he's not just fighting but also saving lives.
Another plot might involve Izuku's healing ability being linked to his emotions. So when he's really determined or passionate about saving someone, his healing power becomes stronger. This could lead to him having to overcome his own self - doubt and fears in order to fully utilize his power to heal those in need.
Another plot could involve Izuku being in a situation where his harem has to work together to protect him. Maybe they find out about a secret plot against Izuku and combine their unique quirks to keep him safe. This would show the different relationships he has with each of them and how they interact as a group.
Perhaps in this fanfic, Izuku doesn't get injured as severely during his training and heroics. So, he is able to progress at a much faster rate. He could start to shine earlier in the story, inspiring other students in different ways than in the original series. This might also change the dynamic between him and Bakugo, as Bakugo may feel more threatened or in awe of Izuku's rapid growth.
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 idea could be that Izuku's quirk is related to time manipulation. He could use it to slow down time during battles, giving him an edge in combat. For example, he could dodge attacks with ease and plan his counter - attacks carefully.
One interesting aspect is seeing Izuku's character development in a new light. When he's made stronger in fanfiction, it often shows how he handles new levels of power and responsibility. For example, he might have to deal with jealousy from his peers or new expectations from his teachers. Another aspect is the unique power - ups he gets. It could be a new quirk or an enhanced version of his existing one that changes the way battles play out in the story.
One interesting plot could be the students pranking All Might by changing his costume into a ridiculous version. Maybe they use some quirk - related gadgets to make it look like his costume has turned into a giant plushie version of himself. Another plot might involve Deku being the target of a prank where his classmates make him believe he has lost his quirk for a day, which leads to some comical and self - reflective moments for him.
One plot idea could be that Izuku and Momo are paired up for a special training mission. They have to learn to combine their quirks in new and unexpected ways. For example, Izuku's super strength could be used to enhance Momo's creation of large and complex structures. Another idea is a story where they both get trapped in an alternate dimension and have to rely on each other to find a way back. They face various challenges that test not only their quirks but also their friendship and trust in each other.
One idea could be that Toga, in an attempt to understand Izuku better, tries to live a normal life like him for a while. She disguises herself and enrolls in U.A. High, leading to a series of comical and tense situations as she tries to hide her true identity from Izuku and the other students.
One idea could be that Shoto and Izuku have to team up for a special training exercise that goes horribly wrong. They end up in an unknown part of the forest and have to rely on each other's quirks to survive and find their way back. For example, Izuku uses his One For All to climb tall trees to get a better view, while Shoto uses his ice to create shelters at night.
One possible plot idea could be Izuku developing a new and unique quirk spiral ability that sets him apart from his peers. Maybe it starts as an unexpected mutation of his existing power. Another idea could be Izuku getting caught in a time - spiral within the My Hero Academia universe, where he has to relive certain events to change the outcome for the better. And a third could be Izuku's spiral being related to a spiritual or mental journey, where he discovers hidden aspects of himself and the hero world.