"Wait until I come back." Someone said vaguely.
However, it took too long, so long that he forgot who he was, so long that... He realized that his hair would also be stained with white frost.
After passing through time and space one after another, when he thought he had seen through the prosperity, he woke up from the dream.
It turns out that they are all false.
The above is the main plot, then the sub-plot, of course, is our various animations, novels, etc., It is possible, it has its own lightning rod, it is the first work, if you don't like it, don't criticize it.