In the manga, Ochaco Uraraka is shown to be very brave and has a big dream of becoming a great hero. Her personality is charming and she grows throughout the story.
One possible plot could be that Ochaco wakes up one day as a kid and has to figure out how to reverse it while also dealing with her now child - like body. She might struggle with her hero training as a kid, like not being able to reach high places or lift heavy objects like before. And she could have cute interactions with her classmates who are now much bigger and older - looking compared to her.
Mentally, Ochaco would struggle. She has the mind of an older person but is trapped in a child's body. She would have to deal with the frustration of not being able to communicate as effectively as she used to. And she might feel a sense of loss for her normal life and the progress she had made in her hero training and relationships.
In some fanfictions, new original characters are introduced. These new characters are designed to be a potential threat to Uraraka's relationship with Deku. They might be transfer students with amazing quirks who immediately take an interest in Deku. Uraraka then sees this new character getting close to Deku and becomes jealous, leading to various conflicts and emotional drama in the fanfiction.
As of the latest chapters, Izuku and Uraraka have shown some mutual interest and closeness, but it's not a definite romantic pairing yet. It's still evolving in the story.
The 'hentai comics uraraka' genre is known for its graphic and potentially disturbing content focused on Uraraka in inappropriate or compromising situations. It goes against the intended portrayal of the character in mainstream media.
In a midoriya x uraraka fanfic, the author might play with the idea of their unspoken feelings. Uraraka's admiration for Midoriya could be delved into deeper, and Midoriya's possible realization of her importance in his life. It could also include some cute moments like when they train together or share a meal, which would add a lot of charm to the story.