Our planet, the underground people

This piece of land had expanded and become vast and unpredictable. It had been decades since then.

Many living beings were reproducing and adapting to this strange world. The prehistoric era of the nuclear explosion was called the " catastrophe " era.

At this moment, in a three-story classroom.

The students were listening to the class below, while the teacher was giving a speech.

we woke up from the ruins and lived on the earth as wild beasts. We continued to study and do archeology. We studied the prehistoric civilization in ancient books and went extinct in nuclear explosions ... At that time, the Bilco Federation and the nisillimia Empire had a war of nuclear explosions, and the earth was turned into ruins."

" we call this era the era of great disasters. we've spent another two hundred years in the ruins, and our bodies are weak and sickly. it's the after-effects of the radiation from the nuclear war, but we can't solve it ...