Cloud beasts are the collective name for all the residents of the Star Huan Yun Society in the Yun Huan galaxy.
The Bell Tower of Wing Wind City contains the memories of the Cloud Beasts and has stood quietly for more than three hundred years.
Qinian, an apprentice in Yun City, was born with the weird trait of memory flashbacks. In order to find the mysterious cloud beast that had never been seen again after bringing him back to Yunshe, he took a part-time job at Dandelion Post Office in an attempt to find him by delivering letters. He had no wings and could only ride a floating skateboard to shuttle between Yi Feng City and Luo Yu Forest. However, one day he discovered that for every letter he handled to Yi Feng City, a vague name that did not belong to any cloud beast would appear in the recipient column after it was delivered...
Intention: Should freedom and dreams give way to "you should"?