One common theme could be Deku's growth. In many fan fictions, even those with unique concepts like 'hung deku', Deku's journey to become a stronger hero is often explored. It might show how he overcomes new challenges and develops his powers further.
I'm not sure about specific 'hung deku fan fiction' stories as there are so many fan fictions out there. You could try searching on popular fan fiction websites like Archive of Our Own. They usually have a wide range of My Hero Academia - related fan fictions which might include what you're looking for.
Another theme could be growth. Deku is constantly growing as a character. In these fan fictions, his relationship with Bakugo's mom might contribute to his emotional or personal growth. Maybe she offers him advice or support that he doesn't get from other characters. And also, there could be themes of unexpected relationships. It's an unusual pairing, so exploring how such a relationship forms and what it means for the characters involved is likely to be a theme.
One of the common themes is redemption. Characters may try to make up for their past mistakes. For example, a character who has done something bad in the original show might seek redemption in the fan fiction. Also, exploration is a theme. They might explore new parts of the world they are in. And power struggles are also common, as different characters or groups vie for control.
Romance is a very common theme. Fans often write about falling in love with a band member. Another theme is friendship, like becoming friends with the band. Adventure can also be a theme, for example, going on a wild tour with the band in a fictional story.
In 'villain deku fanfiction', a frequent theme is the subversion of expectations. Since Deku was initially seen as a pure - hearted hero, seeing him as a villain completely turns that on its head. Another theme is the power struggle. He has to fight against the heroes he once called allies. The theme of identity crisis is also there. He is no longer the Deku everyone knew, and he has to redefine himself as a villain. There's also the theme of the dark side of heroism, showing that the very qualities that could have made him a great hero can be twisted into making him a terrifying villain.
One common theme is the contrast between their worlds. Deku comes from a world of superpowers and heroes being more out in the open, while Batman operates in a darker, more secretive world. So, exploring how these two different environments and mindsets interact is often seen.
One common theme is friendship. For example, in many 'deku female fanfic', Deku forms a deep and meaningful friendship with a female character. They support each other through tough times and grow together as heroes - in - training.
One common theme is the struggle with identity. When Deku becomes a vampire, he has to figure out who he is now. Is he still the same hero - in - training? Another theme is the power struggle. Vampire powers can be both a blessing and a curse, and he has to learn how to control them without losing himself. For example, in some fanfictions, his new vampiric strength is difficult to manage at first.
Well, a frequent theme in 'agent deku fanfic' is the balance between his hero life and his agent duties. He has to figure out how to be a hero in the public eye and an agent behind the scenes. Also, friendship is a theme. His friends might not know about his agent work, but they still support him in other ways, and sometimes he has to protect them without revealing his true role. There's also the theme of facing greater and more complex threats compared to his normal hero work as an agent.
Growth is also a prevalent theme. Both characters are on a journey of self - discovery and improvement, and fanfics usually show how they grow both as individuals and in relation to each other. For example, Bakugou learning to control his temper and Deku becoming more confident.