On the northwest border of Kyushu, a long-abandoned empty city is constantly being eroded by the surrounding yellow sand. It always rains continuously over the empty city. There are only weeds among the ruins. The tallest thing in the city is only a pagoda with several floors broken. The empty city goes hundreds of miles deeper into the desert. Every ten or several decades, a city that has never been illuminated by the sun will appear. Only when this city named Yin City appears, will the sky above the empty city become clear. There is a city general on the wall of Yin City, who has been just a child for thousands of years, looking towards the direction of the empty city, waiting for a ray of soul. For hundreds of years, they met and stayed together, and then parted and died; they came and went, and then took detours and became estranged... This is one of the few stories in this empty city for hundreds of years.