After Digging My Grave, I Became a Master of Metaphysics

There are two Ning Lings in the world, one died at eighteen and the other lived until twenty-two. ———————— The most unlucky thing that happened to Ning Ling in her life was that she accidentally summoned the ghost king from another world line before the academy competition. What's even more unfortunate is that this ghost king is also called Ning Ling. Later, Ning Ling found out that it was herself from another world. When she died, she became a ghost king with so much resentment that she fought with her good brothers from another world to the death. [Main World Yin and Yang Eyes × Vice World Ghost King Attack] Lord accepts Intention: I protect myself