The world is once more split into four dimensions. The Standard Dimension reboots into the Pendulum Dimension, where everyone can now use Pendulum Summoning. Having the vague feeling that something is missing, Yuya enjoys a peaceful day until he is invited by Declan alongside Gong and Sylvio to duel Moon Shadow in the Junior Arc League Championship. During the Battle Royal, Moon Shadow reminded everyone about the Arc League Championship and Lancers selection, which turns out to be Declan's plan to restore everyone's memories of their adventures across the universe for the sake of the infant that Riley had become.