Millions of years ago, there were two living creatures in the world: humans and feathered humans.
The difference between humans and feathered people is that feathered people are born with wings, which are divided into white feathers and black feathers. Their eyes are blue, and they can use spiritual power. They grow very slowly, but their lifespan is very long, hundreds of times longer than that of humans. Generally, feathered people have a life span of more than 100,000 years, but the most is only 300,000 years. Others are no different from humans.
Most feathered people are innocent and kind, but under the influence of some humans, some feathered people have begun to deteriorate. They rarely attack humans actively, but humans exclude feathered people.
Therefore, Yu Ren's first Queen of Yu led Yu Ren to create another time and space, and spent his whole life's spiritual power to build a time and space wall to completely isolate the human world from the Yu world.
Even so, there is a constant connection between the human world and the feathered world. Every feathered person will go to the human world to survive the tribulation for 18 years when they reach adulthood. During these 18 years, they will have the memory of the feathered world erased and be reincarnated as a human being without spiritual power. It is not until they reach adulthood at the age of 18 that they can regain their identity as a feathered person. At the same time, they must receive the marrow cleansing ceremony within three days. After three days, they will return to the feathered world and will never be allowed to enter the human world again.
If a feathered person dies unexpectedly within 18 years, he will never be reincarnated and will never be able to return to the feathered world.
But tens of thousands of years ago, cracks appeared in the wall of time and space. Many feather people with weak spiritual power could pass through at will, and many people who had overcome the tribulation never returned to the feather world.
Concept: Love treats time as its imaginary enemy