Thousands of years ago, the demon race and the human race fought and fought against each other. The long-standing war caused a man who claimed to be the angel Michael to appear. He suppressed the demon tribe in Xuanyao Mountain and surrounded it with a huge forest to form a blockade formation.
In order to prevent demons from appearing in the world, humans built the Great Wall around Xuanyao Mountain and stationed troops to guard it for thousands of years. This army has changed from a demon-defending army to the Mulin Border Guard today, with a large scale.
The human race has five major skills, in order of level, human skills, spiritual skills, fairy skills, ghost skills, and rare miracle skills. As of now, miracle skills have not appeared in the human race for thousands of years.
The demon clan is bloodthirsty and arrogant. They have seven major races, namely dragon clan, sea clan, beast clan, demon clan, ghost clan, wing clan and blood clan. Each group has its own independent skills. Together, they regard Cthulhu, the leader of the sea tribe, as the supreme and plan to escape from this space.
In 1937, the country of Fu opened the door to its second demon world and cooperated with the demon clan to rule the world.
After eight years of multinational war, the country surrendered to its allies and announced that it would no longer allow this door to be opened. The United Nations also classified the two doors as world assets and secretly researched the key to a door that can be built outside the door...
In the 21st century, ordinary humans no longer believe that monsters exist in the world, and humans with spiritual power are also silently guarding the world.
But all the peace disappeared after the appearance of a girl and a boy...
