Ice blue light from the thick wall, toward the dawn that should have appeared in the ordinary day, but today is still chaotic, dark sky, flying up!

in a world where there is no electric light at all, and we don't know what electric power is. The stone walls will suddenly glow with ice blue light. This is something that no one can think of. This is something that people in this world should be curious about when they encounter this situation.

However, in the ice blue, which is as beautiful as a dream, and in the beautiful light that should be admired and intoxicated, the people who should have...