The town that developed the newest network - Den City. There, in "LINK VRAINS," the VR space managed by SOL Technology, people Duel day and night. Our hero, Fuji Yuusaku, is a cool high schooler who posses outstanding powers of observation.
You can't change the program 
from within the Duel Disk.
Gib’s auf. Ich habe Programmänderungen
von innerhalb der Disk blockiert.
Es inútil. No puedes cambiar un programa
dentro del Disco de duelo.
Você não pode mudar o programa
 dentro de um Disco de Duelo.