Intro. Of course. Here is the beginning of the Dark Romance fanfic, with the needy, possessive, violent and dangerous demon - just as you asked:
"Inferno my" - Chapter 1: The Brand
The first time I saw him, the air seemed to freeze around me.
It was a common night - or at least it should have been. A strange wind blown through the empty streets, as if the city itself breathed around me. And then, in the middle of the darkness, he appeared. High, wide shoulders, wrapped in a black overcoat that seemed to devour the light around. The eyes? A red so intense that it looked liquid. Like boiling blood.
He saw me.
And at that moment ... something inside it broke.
The expression was of pure obsession. Hungry. But not a normal hunger. It was something deeper. Something sick. As if he had spent centuries waiting for me - and now that he found me, nothing and no one could get it out of him.
\- You ... - His voice was serious, hoarse, and had something animalous. - It's mine.