The main story tells that after Gray, who is in the preliminaries, accidentally falls into a black hole, he travels to different worlds, including Yokohama, the magic world, etc., And he is the [traveler] in all worlds. He will meet all kinds of people during the journey, and he will collect [slates] from each world. What kind of adventures will this journey bring? Please read this article
Purpose: Go to another world and find the so-called [truth]
