It's not considered Danmei, nor romance; it's not considered time travel, nor is it considered fandom.
Maybe a bit of a comic book flavor? But the original worldview also accounts for a large proportion...
All in all, this is an article that most people will find very strange.
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People in this world like to call the approximately spherical land they live on [Earth].
As of June 2005, the earth's population has reached 6.477 Billion.
It is expected that by the middle of this century, the earth's population will reach 9 billion to 10 billion.
About 128 million people are born every year on earth.
About 57 million people die every year on the earth.
What is the reason for such rapid growth?
In these records, are there "[people] who should not have been in this world"?
People who come from [worlds] other than [this world] are collectively called [people from other worlds], or... According to the popular saying on Earth in recent years, they are called [travelers].