Synopsis
In the distant future, the Earth is covered with thick clouds and the sun is no longer shining. A world where plants have died and oxygen has become thin. However, human have survived by developing technology that turns people into plants to produce a small amount of oxygen in order to survive. Will they live as humans in this uncertain world, or will they abandon their suffering and embark on a new life as plants? They are forced to make a choice... (Source: Shogakukan, translated)
