When the World Begins to Overlap

Does the murderous monster in urban legend really exist? What's wrong with this world? When the college entrance examination was about to take place, an old man suddenly appeared and took He Lailu on an adventure to save the world. Urban legend creature? Unspeakable creatures in the mountains, secrets under the deep sea? None of this is just a legend. Parallel worlds began to overlap, and the monsters that had been expelled returned.