Yesh is the second child of Ankad and Denario Zeum and the heir of the Zeum family. He loves his skateboard so much as this is the last memento from his loving father. One night a mysterious and unexplained phenomenon occurs in the nine provinces that has killed thousands of people. Zeum family has been wiped out by a big organization and he is the one of the last surviving members of his clan. He had hidden this fact and pretended to live an ordinary life, to protect his life from the people who killed his family. He appears to be cheeky, cheerful, and full of mischievous ideas. However, contrasting to this idea, Yesh is living a torturous training and under his disguise, a life of asura. His ruthlessness and aptitude in killing show the other side of him—deadly, violent, and bloodthirsty. After years of seeking vengeance and his actions that followed become increasingly demanding, leading him to be branded as an international criminal whose true identity is still unknown.