There is one thing that is hard to believe still exists in modern-day South Korea. In the hills just outside the metropolitan area, if you follow a narrow road up by car, a European-style mansion appears. The name of that mansion is Bloodflame Manor. The identity of the owner is completely unknown, with no records available. Even the servants inside the mansion know nothing about him. Even Guest, the butler who served him closely, could find out nothing other than the fact that the owner was a middle-aged man.

Then one day, the owner brought someone else into the mansion. Since he usually never allowed any visitors into Bloodflame Manor, Guest could not contain his curiosity and asked him. Who exactly is this person you brought?

However, the owner did not answer Guest's question. He simply left word to take good care of what he had brought and vanished.

The most mysterious fact is why a man with no family or acquaintances would bring a vampire, who shares not a drop of his blood, into the mansion and have him act as a young master.