Humanity has entered an age of super-civilization, where ordinary people can use time-space machines to transmigrate to all kinds of worlds.
If you want to go to another world, you must be hoping to live the good life there.
You want to become a supreme expert in a fantasy world, a mecha war god in a sci-fi world, the richest man in an urban world, or enjoy a life with three wives and four concubines in an ancient world.
To make any of that happen, you need one thing: a System.
With countless civilizations and a dazzling variety of worlds, Systems can't all be one and the same.
So in the world of super-civilization, there are System designers and System testers.
System designers handle a System's settings, activation conditions, and so on. System testers, meanwhile, enter the corresponding civilization ahead of time to test things like the System's usability and exhilaration level.
Only Systems that have passed testing can be put into official use.
Li You is a System tester. He is diligent and capable, but the System designer he works with has a hole in his head...
