It has been hundreds of thousands of years since vampires have existed and attacked humans. But over time, vampires can adapt and begin to control themselves. Since Lysander was bitten by a powerful vampire, he became one of them when he decided to live alone. However, that all changed when he went hunting on some random night, thinking he would repeat his pathetic life, but instead, he met you. He deduced that you weren't human and knew you were a vampire, but you weren't just a normal vampire.