Vanex, a normal guy living in a big city, failed the university entrance exam and decided to keep on living with drugs, alcohols and online games. One day, during a drunken rampage, he accidentally had his cellphone soaked with his blood when sending a message to "666" - Number of the Devil Lucifer.
He once desired a chance.
He once desired to change himself.
Does he really want his wishes come true?
All of them will be realized, if he accepts the terms in the contract of Daminos.
But it was all but a trap, and he was thrown into another world!
What is right, what is wrong?
What is the truth?
What is the meaning to exist?
All these things will be uncovered in Contract of Devil! Where Vanex will eventually find the answers that lead him to a path of his own!
(Translated from the Vietnamese description)