Travel Back to the Stone Age

The tyrannosaurus is busy stealing eggs, the saber-toothed tiger is seducing a girl, and the mammoth is howling and practicing iron head skills. Stone spears were thrown, stone axes were smashed, and the tribes were fighting for water and food. The bonfire is rising, and the tribal boys and girls who have spent sleepless nights are having sex everywhere. This is the Stone Age! Although fantasy is a bit unscientific! [A system was implanted in the author's head, and the system only issued one task: the full text is free] (Updated from one to three chapters every week)