Once upon a time, mysterious creatures such as the strange inhabitants invaded the solar system, causing humans to be displaced and only able to travel in the vast universe on a giant spaceship the size of a planet, Sidnia. After a long thousand years, the residents of Sidnia have not encountered any strange inhabitants for a hundred years, but they have never relaxed their vigilance
Once upon a time, mysterious creatures such as the strange inhabitants invaded the solar system, causing humans to be displaced and only able to travel in the vast universe on a giant spaceship the size of a planet, Sidnia. After a long thousand years, the residents of Sidnia have not encountered any strange inhabitants for a hundred years, but they have never relaxed their vigilance