In the legend...
There is a balance in the gate of time and space that is responsible for managing various parallel worlds...
And there... It's called the Space-Time Administration...
And the people in the Space-Time Management Bureau...
He is responsible for finding a balance that can manage various parallel worlds...
It's also a school....
Can teach you how to manage the so-called [parallel world]
It also teaches you how to develop your own soul abilities...