As a person who had always been fixated on her weekly routine, Nina felt stranded when she was dropped to the unfamiliar world below. With no other choice but to accept the help offered by a local courier business, she soon finds that the group of women she works with have a lot more to them than what meets the eye. Promised that she can return home after her contract is finished, Nina's chaotic time at The Cloud Orchestra begins. But will she really want to leave when the time comes?