The reincarnation of the strongest beings from another world—any hope for a normal life is long gone. The Heavenly Demon, on the verge of unifying the world, and his arch-nemesis, the Ice Witch, perish together after their final battle. They are reborn as an ordinary pair of twin siblings in the human world. But peace doesn’t last long. Now in their teens, organizations of reincarnators are shaking the world. The world refuses to leave the siblings alone, even as they try to hide the powers from their past lives. Former subordinates begin to gather one by one. The Ice Witch now stands at his side, not as an enemy but as a partner. Can the Heavenly Demon once again rise to become the strongest in the world?!