It's highly inappropriate. The original works that these characters come from are often aimed at a wide range of audiences, including younger viewers. Writing such sexual fanfiction not only violates the spirit of the original work but also may expose inappropriate content to an unintended audience. It's better to focus on creating positive, character - developing fanfiction that stays true to the essence of the source.
In 'deku meets future deku fanfiction', perhaps the future Deku warns the present one about upcoming threats. He could tell him about villains he'll face in the future and how to defeat them. This would give the present Deku an edge in his battles and also in his growth as a hero.
Well, obviously Deku in two forms - the younger and the older version are the main characters. The younger Deku is the one who is still growing and learning, while the older Deku has more experience.
Most mainstream platforms don't allow 'lemon' (adult - oriented) fanfictions due to their terms of service. But if you're looking for non - adult Izuku x Melissa Shield fanfictions, you could check out FanFiction.net as well. There are many talented writers who create great stories about their relationship, focusing on things like their friendship, adventures together, or how they support each other in the My Hero Academia universe.
Another possibility is that a new villain emerges as a result of the time - travel or whatever mechanism brings future Deku to the present. This villain could be from a future where Deku's actions (or inactions) have led to a more dangerous world, and he travels back in time to stop Deku from making those mistakes again. However, his methods are extreme and dangerous, making him the antagonist of the story.
Another plot might involve the older Deku being from an alternate timeline. He shows the younger Deku different ways he could have developed his skills and relationships, which makes the younger Deku reevaluate his own path as a hero.
One negative impact is that it can make the fan community uncomfortable. Many fans are there to enjoy the positive aspects of the characters and the story, and this type of sexual content can be a turn - off. Another is that it can give a bad name to the fanfiction world as a whole, making it seem less family - friendly or respectful.
One common theme is friendship. Their meeting often focuses on how they support and encourage each other. Another theme could be growth, both in terms of their quirk development and personal growth.
In this fanfiction, Uraraka and Deku might have a heart - to - heart conversation. They could share their dreams and fears, strengthening their bond as friends. Maybe they'll train together and Uraraka will improve her quirk with Deku's help.
One popular plotline could be Deku and Melissa working together on a new hero gadget. Since Melissa is really into tech and Deku is always looking for ways to improve his hero skills, they might collaborate on something that gives Deku an edge in battles. Another could be them going on a mission together outside of UA. This would test their relationship as they face challenges and rely on each other.