Am I back on Earth?

The city walls soon appeared over the horizon. As one would expect from cities, it was several times bigger than the town I was in. Even from this distance, it's quite apparent that the walls are similarly made with cement. 

We weren't the only ones on the trail leading up to the city. There were many travelers aside from us. I've only noticed this now but both the Mercenary and Adventurer Guilds use the INRT or whatever it's called. Those that I'm sure are mercenaries are of course wearing the license rings, but those that I am pretty sure are adventurers are also wearing rings. The heads of their rings, however, are circular and not rhombus-shaped like the mercenaries. It must be a design choice so that the two different license rings wouldn't be confused.

As the wagon got closer and closer to the city, I looked at the twins who were still sleeping peacefully. It's still quite early in the morning, no need for the two children to wake up this early.