Heavenly demon in fantasy world

The Heavenly Demon, Baek Jung-hyuk, woke up as the eldest son of the Dmitry family. He was known as the fool of the Dmitry family. But he also had another identity that's in murim world where monsters live, he was the strongest person in the that world, if doesn't matter what this person did in past but what matter what he will do.. A predator has come