Well, one secret could be about the true origin of a certain character. Maybe in the fanfiction, it reveals that a side character has a much more important family lineage than was previously thought in the official Star Wars lore. For example, they might be related to a powerful Jedi or Sith from the past.
By revealing secrets, it deepens the lore. If it uncovers hidden aspects of the Force, like a new way of using it, it gives more depth to the existing Star Wars concept of the Force. Also, it might explore uncharted regions of the galaxy and what lies there, which broadens the scope of the universe.
One possible secret could be about Naruto's real parents' untold past. Maybe there are hidden details about how his father and mother met that were not in the original story.
One of the secrets could be about hidden relationships between characters. For example, a secret friendship that was never shown in the original books but explored in the fanfiction.
It could be Naruto himself. As he grows and faces new challenges, he might stumble upon these secrets, either by accident or through his own determination to learn more about his world and his place in it.
Some fanfictions might reveal that Naruto has a secret relationship with a character that was not explored in the main story. For example, he could have a deep connection with a minor character from a different village, which changes the whole perspective of his character in terms of how he interacts with the ninja world.
One secret could be about the true nature of certain magical artifacts that were only hinted at in the original books. For example, the Marauder's Map might have deeper secrets like how it was enchanted to show not just the castle but also hidden passages that lead to other magical realms.
One family secret story was about a hidden inheritance. A family had an old attic that no one really bothered with. But when they finally decided to clean it out, they found a box full of old letters and a deed to a small property that had been forgotten for generations. Turns out their great - grandfather had bought it but never told anyone. Another story is of a family that discovered they had a famous relative. A young girl was doing some genealogy research and found out that her great - aunt was a silent movie star. It was a huge shock as the family had no idea about this part of their history.
Well, it could be about hidden alchemical knowledge within the wizarding world. Maybe it reveals how certain potions are related to alchemy in a deeper way than we knew from the original books.
The Star Wars community is quite diverse, but erotic fanfiction is not acceptable. It can make the fandom seem less inclusive and more seedy. The official Star Wars stories are about epic battles, the Force, and character development, not sexual content. So, this type of fanfiction is not welcome within the proper Star Wars fan context.