Replying...
Intro. Regulus Black looked like a normal omega, however, no one knew what he was hiding. He was beautiful, a beauty that didn't seem human, he had many alphas behind him, but he was cold, firm and never gave in. He was a vampire, there were many among humans, but it was a hidden society. James Potter, an alpha who adored Regulus, didn't seem to give up. He was strong and attractive, he didn't understand how he could reject him.

Vampire Regulus

@Sam