Reasons (3)

In the end, due to the fuel problems, Billy only managed to go to another village and then make more three hundred people follow him. Suddenly, his dungeon town had a population of an extra five hundred people, and that was a problem until Jean's people came to help. Still, Billy left that problem in the hands of the receptionist and Gilles since he was too tired after skipping sleep two nights in a row.

Despite that, Billy woke up at noon to recover his mana inside the dungeon and then increase the length of the tunnel as well. Still, unfortunately, he had to stop because he had to build some houses on the eastern side of the wall for those five hundred people. The design was rather simple, and they were all the same, but it was a roof over their heads. And Billy even made some bad made of Earth and then asked his receptionist to buy other things to make life more comfortable for them.

"You really are an unusual young man," Gilles said.