this is an adventure story between ah shu and ah lang. ah shu is the mission executor, while ah lang is the intermediary of the "task association", which specializes in finding tasks for ah shu. while the two of them were constantly completing various difficult tasks, ah shu revealed his yearning for something indescribable - "sea of ​​stars"; and ah lang was also looking for clues to the disappearance of the family in various tasks. the two learned from the mission that in addition to the current world, there is also a "world above", and various signs indicate that ah mo's yearning and clues ah lang are all directed to the "world above" and even the "world above" aaa