The Boku no Hero manga is finished. It reached its conclusion after a successful run, leaving fans with a complete narrative and memories of an exciting journey.
Well, 'boku no hero novel' is probably about the adventures in the world of heroes. It could have new storylines that didn't make it into the main anime or manga. It may focus on a particular character's growth, like Midoriya's journey in a different light, or introduce new characters and their unique quirks within the hero - filled universe.
One popular idea could be creating an alternate origin story for a character. For example, giving Deku a different quirk acquisition experience that still leads to his growth as a hero.
It could be Midoriya. Imagine Midoriya getting access to Iron Man's technology. He's already a determined and intelligent hero - in - training, and with Iron Man's tech, he could become even more powerful. He might struggle at first to adapt to the new technology, but his strong will would drive him to master it and use it to protect others in new and exciting ways.
Well, in a 'Boku no Hero Academia' fanfic with 'breakdown' in the title, it could be about the breakdown of society as we know it in the BNHA universe. For example, if the hero system fails, how would that impact the different characters? Or perhaps it's about a specific quirk breaking down, like if a quirk starts to malfunction and cause problems for the user. This could lead to interesting storylines where the character has to deal with not only the physical problems but also the social implications.
I'm not entirely sure as it could vary greatly. Fanfics often take the original 'Boku no Hero' concept and add their own unique twists. It might be about creating new storylines with the existing characters in a 'slave' - themed (which could be a metaphorical or unique take on power dynamics, not literal slavery in a bad sense) adventure or relationship scenarios.
In fanfics about Shigaraki from Boku no Hero Academia, he is often depicted with more complex backstories. Some fanfics explore his childhood traumas in greater detail, which gives readers a deeper understanding of his motives. For example, they might expand on how his family's neglect led to his current state of mind.