Sowohl Declan als auch Yuya bereiten sich auf das bevorstehende Turnier vor. Währenddessen verliert Zuzu eine wichtige Karte mit starken Kräften, und Yuya findet sie …
As Reiji continues to work on his own Pendulum Summoning in preparation for the tournament, Yuya tries to figure out how to bring Pendulum Summoning to its next evolution. Meanwhile, Masumi approaches Yuzu and Sora about the masked duelist, having come across the incident where the LDS students disappeared. Masumi prepares to duel against Yuzu, but is suddenly confronted by Shun, who attempts to duel against her. However, the other masked duelist, Yuto, shows up and knocks out Shun, who believed Yuzu to be a girl named Ruri, before warning Yuzu not to use Fusion summoning. Just as Yuya arrives with Yaiba and Hokuto, Yuzu's bracelet glows again and Yuto disappears once more. As the group disperse, Yuya comes across the Polymerization card that Yuzu dropped.
Duellanti di tutta la città vengono continuamente attaccati e tutti sono alla ricerca del colpevole e della sua motivazione!
