Can you recommend a two-part vampire novel with a long name, where the male and female protagonists can choose their gender after they become adults? I saw it about 10 years ago.

"Marry a Vampire" is a fantasy romance novel written by the author Jiu Suihe. The general plot of this novel is as follows: After ten years, I woke up to find that I had a handsome and rich vampire husband…but why did I forget everything in the past? Who can tell me what happened in the past ten years? In the history of love, am I a princess living in an ivory tower, or a Cinderella who left her crystal shoes behind? ---------------------------- "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… ---------------------------- "The Twelve Young Fairies" was a fantasy romance novel written by Xia Qiye. The general plot of the novel was: A huge fire burned for three days and three nights, and the most famous Black Rose family of the Blood Clan was destroyed. Sixteen years later, the mysterious girl known as the monster, with blood-red eyes and silver hair, arrived at the Holy Ten Nights Academy. "Who are you? Who…am I?" The girl's blood-red pupils were filled with confusion, struggle, pain, and finally turned into a hollow. "I…am your master." The man's deep and hoarse voice sounded, and his slender fingers brushed across the girl's fair skin. -- "Go there and take back your heart." The man tapped his finger lightly, and a trace of red slid into the girl's chest. "Heart?" "Yes, your heart." The man's voice was full of temptation and bewitchment. Twelve goblin-like youths, twelve Rose Nobles, a thousand-year battle, the winner would be king. Scarlet eyes and silver fangs."Your blood is really delicious." The King of the Blood Race, who would be reborn once every thousand years, returned bathed in blood. Are you ready? ---------------------------- "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! ---------------------------- The book "Past is Love" was written by the author, Zuo Zhuan Yougui. It was a romantic, youthful-campus novel. The general plot of the novel was: If someone told you that they liked you, regardless of whether they were male or female, then please give priority to this person… Let's see how the two boys make their choice about love between reality and their dreams… ---------------------------- "The Demon Vampire Seizes Love" was a romantic youth-youth campus novel written by Snowy. The general plot of the novel was: This article is mainly about a girl who lived in the era of co-existence with humans, but was sent to the school of demons and vampires. The rulers of the demon world and the vampire world fell in love with the girl at the same time, but the girl loved them both, so they started a war of love. At that time, the girl mysteriously disappeared. The demon ruler and the vampire ruler joined forces to find the girl. After finding her, they found that she was the person that the demon world and the vampire world were searching for. 。 ---------------------------- "Vampire's Love: The Vampire's Favorite" was a fantasy romance novel written by Forever Worriless. The general plot of this novel was: A high school girl broke into a small town where vampires lived and became the deskmate of the Duke's heir, His Highness Morris. On the first day of school, she was attacked. The handsome vampire boys appeared one after another, and she was involved in a deeper mystery. As the witch doctor's bloodline awakened, she discovered a huge conspiracy behind her. ---------------------------- "100% Favor: Goodnight, Vampire!" This book was written by the author, Lady Fujiko. It was a fantasy and magical romance novel. The general plot of this novel was: She was just an "ordinary" human girl who had just graduated and was dumped by her ex-boyfriend. A chance encounter had made her his exclusive "blood bag." He was the heir of one of the three strongest families of the Blood Clan. He was a boss outside. It seemed to be a foreign trade company, but in reality, there was another truth. The people around him, including himself, had unspeakable mysteries and secrets that were called "taboos." ---------------------------- 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! ---------------------------- "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.