A night copulation with the billionaire

Warning: matured content. **** In a world where infected humans and supernatural creatures exist, Anna, a lonely and homeless orphan, unexpectedly becomes a central figure in a hidden world after making a deal with a mysterious stranger. Despite her initial reluctance, she has no choice but to spend a night with a strange and inhuman billionaire to save her dying sister. Trapped in a nightmarish situation, Anna is forced into a life of sexual slavery and enduring abuse from the heartless billionaire, who takes lives without remorse and is as cruel as the grave itself. After enduring immense suffering, Anna swears to seek revenge and make him pay for every terrible thing he has done to her. She devises a plan to make him regret his actions, wishing him the same pain he inflicted upon her. However, during her journey for vengeance, Anna discovers a dangerous secret she was never meant to know. The billionaire is not just a wealthy individual; he is the ruler of the seven deadliest underworlds in history—a supernatural being known as a monstrum. Knowing this puts Anna's life in grave danger, as her knowledge is forbidden for someone like her, a mere human. She becomes a target, pursued by the seven underworlds and the mafioso responsible for her parents' death. Anna's life takes a drastic turn as she becomes prey for these powerful predators. Can she survive the horrifying plot twists and challenges she faces, or is her fate sealed?