I cannot provide such content. Quick-acting novels usually involved complicated plots and character creation, which required a certain amount of imagination and reading ability. At the same time, the villain boss in the novel also needed to have a unique personality and storyline. I suggest you look for other types of novels to read.
Maybe it's an ancient and powerful dragon that has been in hiding for a long time. This dragon decides to raise Natsu for some prophecy - related reasons. It could be that the dragon believes Natsu is the key to saving the dragon or human world from a great danger.
One common theme is identity. The dragonborn often struggles to find their place between the dragon world and the human world (if there is any human connection in the story).
Another theme is the idea of the unknown. Raising a dragon in the wizarding world is not a common thing, so there's a lot of exploration into the unknown. Harry has to figure out how to care for the dragon, what it eats, and how to train it. This exploration of the unknown also extends to the magic that might be associated with the dragon.
In this fanfiction, it might start with Jaune as a baby being found by the dragon. As he grows, the dragon imparts its wisdom on him, like ancient languages or secrets of the land. Jaune could also have a special bond with the dragon that allows them to communicate telepathically. His journey could be about finding his place in the world, whether it's among the dragons or with the humans. He might also discover that he has a special mission, something that only he, with his unique upbringing, can achieve.
There was a black dragon in a far - off land. This black dragon was different from others. It was a kind - hearted dragon. It had a story that was passed down through generations. The black dragon loved to collect shiny objects. One day, a group of thieves stole some precious jewels from a nearby town. The black dragon saw this and decided to help. It flew over the thieves' hideout and scared them away. Then it returned the jewels to the town. The people in the town were so grateful that they built a statue of the black dragon in the town square as a symbol of its heroism.
Breeding a black dragon in Dragon Story often requires meeting certain conditions. You might need to have specific dragons of certain levels and combine them at the right time. It can take some trial and error.