The time in which Cheong exists now is before the establishment of a full-fledged human civilization, in an era so primitive and undeveloped that inferior savages still roam the earth.
The fact that the level of civilization, individual perceptions, concepts, and social conditions are not much different from those of similar human-like apes proves this.

Even communication was like this.
Unlike Cheong’s homeland, where information can be exchanged across the globe without time differences, the communication in this era relies on human feet.

However, even these ancient primitives had their own secret weapons: a cutting-edge technology that allowed …