20 x 5 years - The government has launched a top secret project as a measure to combat the declining birthrate and aging population.
It was surrogacy, where a criminal with a healthy uterus could atone for his crime by providing the mother's body in place of a couple unable to bear children.
Namiko Kurata accidentally kills the child of her husband's cheating partner, and is sentenced to death and sent to prison.
However, she was faced with the choice of receiving the death penalty or becoming a surrogate mother.
A paradise prison where new life is born... But what was waiting for Namiko there...!?
