A serial killer named Soda Kiyoshi gets cornered by the cops and falls into a great river and perishes but wakes up in Hell where he meets the great fallen angel known as Lucifer who then makes a deal with him. In another world ruled by humans where great imbalance of good outways evil. He is given a choice, to stay in Hell and suffer for his sins or be reborn into another world where he is given the task to become the next demon lord. He takes the deal and now is given a chance to restore the balance of evil into the world as the next Demon Lord Reborn. It’s up to him to liberate the monster kind from the so-called peace that plagues the land ruled by humans. Is he up to the task? If not he faces damnation in Hell for his failure. This is a story about a demon lord’s journey to bring about the second coming of the Demon Lord who has been absent for over a thousand years. This is how Demon Lord Tsubasa became the scourge and savior of the new world!