After admitting Shark into hospital, Yuma and friends get help from a reluctant Mr. Kay to help track down the key's location, because Caswell reminded him of all the destruction his Crashbug virus caused. Meanwhile, as Kite experiments on the key, he manages to find a way to enter the realm inside the key where he finds Astral and challenges him to a duel for all his Numbers. As the duel goes on, Astral's fear of facing Galaxy-Eyes Photon Dragon again puts him in a dire situation. As Yuma and his friends manage to break into Kite's hideout thanks to Kay, Astral decides to face his fear and stand up to Kite.