Traveling through thousands of years, he finally became the Ghost Emperor. When he returned, he had only been alive for eighteen years. He originally wanted to be a quiet high school student, but he found that in this world, ghosts began to resurrect and demons were breeding. And when the enemies from other worlds crossed the rift and landed on the earth, they saw the young man wearing a blue and white school uniform in the crowd.
The young man slowly raised his head and showed a half-smiling expression: "Long time no see."
