When the sun is shining in the sky, people can see the prosperity of the world at a glance, but you can truly understand the world.
When the sky is full of stars and moon, people can see all the lights at a glance, but you have really understood the darkness.
There is such a group of people who are constantly wandering in unknown parts of the world. They are not known to the world, but their stories are spread throughout the world.
They are called "mysterious masters".
