A Way To Survive

Uri is a descendant of the vampire king. A human family raised him. When he was living happily with his family, an organization called Red Leaf found him and wanted to kill him.

After escaping death, Uri learned about a community of people like him; they were hunted by the Red Leaf organization and driven to the brink of destruction.

So what is the Red Leaf organization? What does Uri do to find a way to survive?