We feed on your blood. You are all my servants. This is the number of days. I am the Night Blood Sect.
For a long time, there has been a group of people who have been in constant entanglement with humans because they make a living by sucking human blood. They are called "vampires" by humans
Although the divine warlocks are not human beings, they take the protection of human beings as their own duty. With their extraordinary fighting power, they are constantly fighting against vampires.
In a battle more than 2,000 years ago, both vampires and magicians suffered heavy casualties. Because of that battle, the magicians were almost extinct.
Time flies. 2000 Years later, due to an accident, a human being's potential as a divine warlock was stimulated, and he inexplicably formed a contract with a vampire. Their story unfolded...