Falling in love at first sight is easy, but staying together until the end is not easy. What's more, the people of the dark world don't believe in love that much.
The young prince of the Vampire clan seemed so charming, yet he kept away from strangers. This veteran lover didn't care that he became the first love of a certain demon boy - it was just one of his many suitors.
(Because he is a male author, his writing style may be a bit strange.)
Concept: There is no thought, what this story wants to express is just the story itself.