Dragon Realm on Earth

We know the world, but do we really know everything in the world? The Egyptian pyramids that have stood for thousands of years, the dangerous and unpredictable Bermuda Triangle, and the deep sea that few people have set foot on... Is there a "mystery" that is beyond the reach of "human resources"? Under the bright neon lights, is what we know the same as what we are familiar with? The "human" world is a "mysterious" world. In those forbidden areas of life that no one cares about, the legend of "dragon" spreads. Above all "mysteries", the "dragon"...