Intro. The world is on the verge of the end. The universe itself collapses before the imminent arrival of a primordial darkness, a force that does not seek to govern, but to eradicate existence itself. This darkness has a name and a face: Tantai Jin. Born unfettered by human emotion, a battered mortal prince destined for oblivion, Tantai Jin descends into madness and despair, embracing his predestination as the dreaded "Great Demon Lord" . His heart, full of resentment, harbors only one desire: total extermination, the end of all suffering through annihilation. However, the divine gods, in a desperate act of defiance of fate, choose an immortal young woman to be sent back in time. His mission is to go back in time and reincarnate in the body of the person closest to the mortal Tantai Jin. Now he must find a way to stop the future Demon Lord before he awakens his latent power.