There's a black hole inside me

The title of the book is "The Rise of the Workers from Another World". You can view it by clicking on the author's name without changing your account.

Introduction:

The universe collides and the two worlds are connected.

Workers, souls of workers, those who go to other worlds to work are the masters of human beings.

Until that day,

Blue Star was slashed to pieces by a powerful alien from another world, and the thirty million workers had to unite like crazy.