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Tang Yoo Sung, a junior warrior with no talent or low level of training, died on the battlefield. But when he opened his eyes and thought what kind of underworld it was! He returned to his childhood past to change the future! The moment of death, the

After a weird hundred years where ghost were appearing, only one-tenth of mankind remained and the number of ghosts exceeding the number of humans remaining! In order to survive, humans needed to choose a "companion ghost" from birth, and constantly