Sora and Yuto's duel continues with Yuya stepping in. During the duel, Sora reveals to Yuya that he's from another dimension, and so are Yuto and Shun. However, his Duel Disk responds to this information, and Sora is teleported away. With no point to continuing, Yuto and Yuya end their duel, and Yuya demands answers.
Yuto reveals there are four dimensions, divided by their summoning methods. He and Shun are from a dimension of Xyz Summoners, where they lived in a city called Heartland. Sora is from a dimension that uses Fusion Summons, and is from Academia, also called Duel Academy, an island school that trains Duel Soldiers. The soldiers of Academia invaded Heartland, and in the invasion Shun's sister Ruri was captured, Academia transforming her and their other victims into cards to take back to their dimension. Yuto and Shun escaped to this dimension, the Standard Dimension, the one that connects the other three. The Standard Dimension is so named because it had no unique summon method — until Yuya's Pendulum Monsters appeared.
Yuto says that there is a Synchro Dimension as well. His words are confirmed when a portal opens and a duelist on a D-Wheel emerges. He takes off his helmet and announces he's been looking for Yuto — and Yuya is stunned to see the newcomers, too, looks just like him.
This episode contains examples of:
- Adaptational Villainy: The entirety of Duel Academia, which is obviously related to the Duel Academy from Yu-Gi-Oh! GX.
- Mister Exposition: Yuto gives Yuya a lot of new information to think about.
- Not So Stoic: Throughout Yuto's info dump, the camera cuts to Reiji a few times - and he's visibly pissed off at what his father has done.
- Wham Episode: Just look at the description. This episode can be considered a 22-minute long Reveal of what all the foreshadowing and plot threads so far have really been about.