I would recommend some novels where the male protagonist transmigrated to the first generation of vampires or the Vampire Diaries.
" I don't think it'll meet your needs, but I'll try my best to recommend a novel that's most relevant to your description." The Reincarnation Blood Saint is a fantasy novel written by the author, Andermai. The general plot of this novel is as follows: The last vampire traveled through time to save his clansmen. History had changed because of the little vampire. Gods, demons, demons, humans, the fate of all living beings was tied to this little vampire. War, conspiracy, the long river of history began to flow backward because of the appearance of this vampire. When the world is in danger, the saviour is the saint. Who said vampires had to be monsters? The history of the vampires was written by him. ---------------------------- " I Became the True Ancestor of the Sanguine in the Otherworld " was a light novel written by the author, Descent of Collapse. The general plot of this novel was: Blood Breeds were also known as vampires. He often appeared in various films and television works. It gave people a cruel, bloody, and mysterious image. After our protagonist transmigrated to another world, he discovered that the vampire he had become was a little different from what he had imagined. He seemed to be able to do all the legendary abilities of the Blood Race, but…wasn't there something wrong with his gender as the True Ancestor? PS: Infinite flow… ---------------------------- " Bloodsource " was a fantasy-modern magic novel written by Benjamin H. The general plot of the novel was: The recent serial murders in C City had not been solved, and all the evidence seemed to point to the existence of a creature in doubt-vampires. At the same time, the vampire hunter organization that corresponded to the vampires had also surfaced, and all of this could actually be traced back to 20 years ago? Twenty years ago, vampires and vampire hunters gave birth to an ominous son, which seemed to be the source of everything. ---------------------------- " The True Ancestor ran off to become a vampire hunter " was a fantasy-mystery fantasy novel written by the author, Song of the Morning Breeze. The general plot of the novel was: Jiang Xiaotan, who had transmigrated to another world, became a top vampire hunter. With his own strength and charm, he gained a group of outstanding companions and became the leader of the Hunter Association. He even kept vampires in captivity to extract their remaining value and suck their blood. However, there was one thing he did not notice. He was a vampire himself. And the strongest True Ancestor in the world. This book was also known as 'The Ancestor of Ghost Annihilation',' About how everyone else knows that I'm very strong but I don't know','Why the Great True Ancestor rebelled?',' The Most Beloved Ancestor Hurts Me the Deepest?', and 'This True Ancestor is obviously very strong but overly cautious.' ---------------------------- " Vampire Farewell " was a fantasy-mystery fantasy novel written by the singer, Huan Ye. The general plot of this novel was: Vampires? Go to the side! This was the world of half-vampires! Absolute beauty? What was so strange about this? Who could resist the charm of a mixed-blood? Subverting the traditional impression, he walked into the emotional world of a half-vampire and unveiled the trace of tenderness under the icy mask! ---------------------------- " My Husband Is a Vampire " was a fantasy romance novel written by the author who praised death. The general plot of this novel was: The person I saved on a rainy day is a descendant of the Blood Clan, which is also a vampire. When I found out the truth, I couldn't turn back anymore. He was already connected to me by blood. I admit that I couldn't leave him. I never thought that one day in the future, I would become such a creature. If you are betrayed and alienated, you can't save yourself. If you are so destined, you can use your life to defeat them. ---------------------------- " The Vampire King's Escaped Concubine " was a fantasy romance and magic fantasy novel written by the author, Huan Banxia. The general plot of this novel was: The first man she saw when she woke up was a vampire. His melancholic eyes made people afraid and fascinated…After knowing the truth, no one was willing to stay by his side…But…where could they escape to? Perhaps they had to wait until both sides were tired before they understood…even if there was no previous dispute, they were destined to be entangled for eternity… ---------------------------- " Don't Run, Vampire " was a fantasy romance novel written by the author named Opaompa. The general plot of this novel was: She was a true vampire fanatic. One day, she suddenly met a vampire prince who was passionate about studying humans, and so the story began… " Thank you, cannon fodder, for providing the cover." ---------------------------- The Vampire Returns: The Prince's Bloodthirsty Little Fairy was an ancient romance novel written by the author, Nocturne. The general plot of the novel was: A vampire who was deeply hurt by love had transmigrated to become a delicate lady. Her face was alright, but why did she only have a year to live? A black-bellied prince had found a little prey that piqued his interest. It was fierce and vicious, but…it was not a good habit to suck human blood! ---------------------------- " Wait Before Dawn " was a modern romance novel written by the author, Extremely Cute. The general plot of this novel was: " The first and last place team up. It's really touching." "What do you know? This is called complementing each other." "Why can't humans live in peace with vampires?" "Do you hate vampires?" "I only know that protecting humans is my duty. Any species that harms humans is my enemy." "If I were a vampire, would you still love me?" "Then you better not die in my hands." "Do you still believe me now?" " I'm sorry, I have to stand with the humans now." "I still want to die in your hands."