Demon Slayer: I Transformed into Wu Ke's Younger Brother, and the System Helped Me Kill Him

The twin brother who traveled through time and became Demon Maitsuji Muzan was supposed to have a fatal start. He had been on the sick bed for more than ten years, and was about to die, but he turned into the ghost of his origin with a dose of medicine. The system was awakened and the blood ghost technique was added. Before he could be happy, he bumped into the newly transformed boss, and his entire arm was torn off in front of him and thrown into the dust. His parents committed suicide, he was despised by his clan, and he was cursed by the whole clan. Even the only mountain girl who has been with him for a hundred years can only watch her grow old and die, leaving only a sun earring. Over the long years, he hunted his fellow tribesmen, sheltered Zhu Shi, and glimpsed the truth of the world. Everything he did was just to one day catch up with the man who had already stood at the pinnacle of ghosts. Now holding the Sun Lun Sword in hand, they both belong to the blood of the origin, and bloodline suppression is ineffective against each other. It is recognized in the world that the only thing that can kill the Ghost King is sunlight, but this is precisely the taboo that one cannot touch. Since no one can do it, then break this deadlock with your own hands. The killing intent that had been accumulated for hundreds of years was waiting to fall into the flesh and blood of Kibutsuji Mukai. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.