Plot
Transfloration — a technology that implants seeds

into the bodies of those near death,

transforming them into plants.

It is the desperate measure humanity

has chosen to ensure its survival.

　

In a distant future where thick clouds cover the sky,

trapping Earth in constant winter and night,

most of the planet’s vegetation has withered away.

Facing a serious oxygen shortage,

humanity has built a society that relies on

the meager amount of oxygen provided by Transfloration.
(Source: Official Website)