Bewitched By A Demon

In this world where Hunters with various magical powers battle monsters from invading the defenceless humanity, Sung Jin-Woo was the weakest of all the Hunters, barely able to make a living. However, a mysterious demon grants him the power of the 'Player', on one condition that Sung Jin-Woo never asked for because he ended up being bewitched. Belial, the demon who saved the young man, entered into a Soul Contract with Sung Jin-Woo without his knowledge. What is this demon trying to gain from Sung Jin-Woo's soul?