Once upon a time, there was a king in a small country who had three sons. Because he couldn't decide which one he should resign his throne to, he said to his sons, "I will resign my throne to a son who brings me the most worthy treasure." So the three sons went off in quest of it.
The eldest son went toward the west. After he walked for a month, he found a thick vine growing toward the sky. He climbed it until he arrived at a cloud and got down to the cloud. He wandered about until he found a bi
