There is some. I've seen some on Wattpad as well. Some focus on how Nejire's bubbly personality might interact with Deku's more reserved and determined nature. It's really interesting to see how different authors imagine their relationship developing. For example, some might write about them meeting during a hero event and gradually falling for each other.
There are themes related to self - discovery. As they fall in love, they also discover new things about themselves. For Deku, it could be learning to be more confident in his personal relationships because of Nejire. For Nejire, it might be about finding a deeper purpose in her hero work through Deku. And of course, there are the typical romantic themes like first dates, confessions of love, and dealing with jealousy from other characters.
One possible fanfiction could be about Naruto learning a new jutsu similar to Hado 90 from another dimension. Maybe he meets a strange ninja who teaches him this powerful technique. Naruto then has to master it quickly to defend his village from a new threat.
In a Naruto Hado 90 fanfiction, Naruto might find himself in a parallel universe where the ninja world is based on different energy systems, and Hado 90 is part of that system. He has to figure out how to use it while also dealing with the different politics and power struggles in this new world. For example, there could be a powerful clan that wants to monopolize the use of Hado 90, and Naruto has to stop them to protect the innocent. This would involve him making allies, learning the secrets of this new world, and of course, mastering Hado 90.
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