Jeong Guwon was an extraordinary being. He was a demon; making him over 200 years old. His birthday is on February 4, his choice of year being 1998 since his human age being 25. He's the so called human that was chosen during the Joseon Dynasty, to be a god sent demon to make contracts with humans to fulfill their wishes, with only one price; their souls will perish in hell. He needs to get a deal done every once in a while though, otherwise, he risks 'Spontaneous Combustion'.