The world was frozen in time. All humans froze, it took two million years, but class 1-A finally woke up again, and they looked around at the reset world. It was nothing but forests. They chose to look for any civilization, but that was their first mistake. They quickly meet a tribe of humanoid creatures, which aren't friendly. They drag them away to their home underground, which was a giant tunnel system. The tribal men spoke a strange language. Soon, they dropped the students in jail cell