The Ocean Planet of Breath

The land on an ocean planet is divided in two. People living in regions with different oxygen levels have different skin colors. A Xin lives in Zone G, while A Su belongs to Zone R. A Ruo is the only one able to freely transmigrate between Zones G and R. She is actually amphibious, and the three of them embark on a series of adventures together. In the real world, the poisoning of Zhongli Xiao Xin exposes a hidden, tragic relationship between the two social classes, laying bare people's suspicions, their deformed state of mind as they panic and lose their way, and the sorrow of losing themselves. Everyone in the world should have an equal right to breathe. A Xin, A Su, and A Ruo create a forest System, ultimately giving the planet's people the freedom to breathe.