One possible plot could be that Villain Deku is on a mission to undermine the hero society and crosses paths with Hero Deku. They engage in a fierce battle where Villain Deku taunts Hero Deku about his ideals. In the end, Hero Deku manages to get through to a small part of Villain Deku's conscience, leaving him with some doubts about his villainous path.
Also, Uraraka is always there for Deku when he has self - doubts. She reminds him of how far he has come and how strong he is. In turn, Deku encourages Uraraka to aim higher and not be afraid to take risks in using her quirk in more creative ways, which is crucial for her growth as a hero.
A possible plot is that Villain Deku has a plan to destroy a major hero institution, and Hero Deku has to stop him. But when they meet, Hero Deku realizes that Villain Deku was once like him, full of hope. This makes Hero Deku hesitant to fight at full force. Or perhaps Villain Deku has kidnapped someone close to Hero Deku, and during the rescue mission, Hero Deku tries to convince Villain Deku to change his ways. Also, they could be from alternate universes where the roles are reversed, and they are forced to interact and learn from each other.
The fanfiction might focus on Deku's character growth in this new and unexpected environment. He could start off as the clumsy, underestimated office worker but then slowly reveal his heroic qualities. For example, he might use his intelligence to outwit villains who target the office's valuable information or use his physical abilities to protect his colleagues from danger. And along the way, he may gain the respect and admiration of his co - workers who previously had no idea of his heroic potential.
Villain Deku might start to question his villainous ways. Meeting Hero Deku could make him see the good in heroism. Hero Deku, on the other hand, could become more empathetic towards those who turn to villainy. He might realize that there are reasons behind it and not all villains are just 'evil' for the sake of it.
Todoroki can start by simply being there for Deku. Just sitting with him in silence when Deku doesn't feel like talking. It shows that he's not alone. Also, Todoroki can share his own struggles. Since he has his own complex family situation, he can relate to feeling down sometimes. This can make Deku feel that his problems are not unique and that it's okay to not be okay.
There are fanfictions where Deku teams up with unexpected characters. For example, he might partner with a minor villain who has a change of heart. This creates interesting dynamics and new story arcs that deviate from the original plot but still stay true to Deku's character.
One common theme is growth. Deku often grows as a hero in these fanfictions by interacting with male heroes. Another theme is friendship. He forms strong bonds with other male heroes. For example, in many stories, he might start as a newbie and through his relationships with more experienced male heroes, he becomes stronger both in power and character.
Well, 'Deku's Redemption Arc' is a cool fanfiction. It explores a scenario where Deku makes a huge mistake during a battle and has to work hard to regain the trust of his friends and the public. Then there's 'The Deku Chronicles'. This one delves deep into Deku's daily life at U.A. High, showing his struggles with schoolwork on top of his hero training. And 'Deku's Family Secrets' is fascinating as it uncovers hidden aspects of Deku's family history that have a big impact on his quirk development.