Underground Age

Due to excessive human pollution of the planet, the natural environment of the planet is on the verge of extinction. In order to protect itself, the planet rains down monsters called heavenly punishment. They destroy all human towns. After most of the human beings are wiped out, they live underground and survive. The humans hiding underground also suffered genetic mutations due to unknown reasons. A new generation of humans begins to have superpowers! In order to regain the ground, humans began to cultivate superpowers. This era is called the Underground Age…