Rakuen no Chloris

Overview

The number of humans has plummeted in a world where a deadly poison was scattered by the explosion of a research facility. One day, Dr. Murakami discovers a woman who was the survivor of that explosion. Her name is Mae. The appearance has become that of a young girl in the first half of her teens, although it helped to create the body which just waits for death newly. In a world where there are no young women, her existence has become the fate of humanity, and the army has sent out an artificial life thug called "the Daughter of God." The fight to survive begins!

Source: AniList