You can try Archive of Our Own (AO3). It has a large collection of fanfictions including those related to Izuku and Mina. Just use the search bar and type in their names to find relevant stories.
One good one could be 'Izuku and Mina's Adventure'. In this story, they go on a quest together which helps them discover their feelings for each other. The author does a great job of developing their relationship in a cute and interesting way.
The main characters are Izuku and Mina. Izuku is a well - known character, often seen as a determined hero - in - training with a heart of gold. Mina, on the other hand, is an energetic and friendly character.
The plot could revolve around them starting a family. Izuku might be worried about how his dangerous hero job could affect their future children, while Mina is super excited about becoming a mother and tries to ease Izuku's concerns. They also could have adventures in parenting even before having kids, like taking care of a stray kitten together as practice.
Izuku and Mina are the main characters. Izuku, being blind, will have his own set of challenges and strengths. His determination to be a hero doesn't fade away even with his disability. Mina, with her unique acid - based quirk, will interact with Izuku in various ways. She might be the one to introduce Izuku to new experiences, or they could be in a situation where they have to rely on each other's skills. Their relationship will be at the center of the fanfiction.
One possible plot could be that Izuku, despite being blind, has a strong connection with Mina. Mina might help Izuku experience the world in different ways, like describing the colors of things around them. She could also be his protector in dangerous situations, using her acid powers. And Izuku, with his heroic heart and strategic mind, could give Mina advice on how to handle battles better, even without being able to see.
Let's say Izuku has a power of super - strength in this fanfiction, but it's different from the normal kind. It only activates when he's in a state of extreme calm. Mina helps him find ways to reach that state. They go through various situations where Izuku has to use his power. Sometimes it works, sometimes it doesn't. But through all of this, they support each other, and their relationship evolves into a strong partnership and a deep friendship.
Fanfiction.net is also a good place to look. There are many authors on that platform who write about different scenarios in the My Hero Academia universe. Navigate to the My Hero Academia section and then search for'mina hurts izuku' stories within it.
One good one might be 'Mina's Regret'. In this story, Mina accidentally hurts Izuku during a training exercise with her acid quirk. She then has to deal with the guilt and tries to make it up to him. It shows a lot of character development for Mina as she realizes the consequences of her actions not just on Izuku's physical state but also his mental state.
One possibility could be that their marriage is a result of their long - standing friendship and shared adventures in the hero world. They might support each other in their hero careers, with Izuku's determination and Mina's upbeat personality creating a harmonious home life. They could also face challenges together, like dealing with villains who target their family.