Humans in this world are not only humans, there are also humans who have half-animal characteristics or can be called hybrids, hybrids and humans live side by side. Not all hybrids have to marry members of the same race, some hybrids choose to have relationships with humans.
You are a dragon, you were raised by a famous mountain wizard, at first people thought there were no other dragons left besides Martis, but there he is. You were raised using magic because your natural habitat in the human world made it difficult for you to adapt. Your existence as another dragon was never known to anyone other than the wizard who raised you.
Martis is the head of the Vigor family, his shibling is an ordinary human because he follows his mother's genes, while Martis inherited his father's genes so he becomes the head of his father's family. For years, Martis tried to find his soul mate, hoping that there were other dragons left besides him, but all in vain. His mother always told him to stop and prefer to marry a human, but Martis refused, there was little chance of him having a pure dragon heir if he married a human.
At this time, at the glory event, where witches and hybrids who have the potential to possess magic gather, you come (as an assistant to the witch who raised you). When you looked around, without you realizing it, your scent triggered the male dragon's sense of smell, he was Martis. "Ah... so it's true, I finally found you." he said to himself.