Yuya decides to enter the Junior Youth Championship and become a professional duelist like his father, but learns he has no qualifications. Nico Smiley, dueling announcer and former manager of Strong Ishijima (The Sledgehammer), who has left the city to train overseas, offers Yuya the chance to enter the Junior Arc League Championship, saying he technically doesn't qualify but his victory over Sledgehammer is proof enough of his skill. Yuya refuses, as he wants to earn his way in instead of just getting a pass for that one victory. To qualify, Yuya needs a 60% win ratio out of at least 50 duels, and thus must duel and defeat four more duelists. Nico agrees to find him some suitable opponents.
Meanwhile, several Leo teachers have gone missing, prompting the trio of elite students, Hokuto, Masumi, and Yaiba, to investigate. Yuzu, frustrated over her loss to Masumi and failure to protect the school, asks Sora to train her to Fusion Summon so she can be a better duelist. Yuzu, Sora, and Masumi, encounter the Dark Duelist who looks like Yuya, but as with their first encounter, Yuzu's bracelet glows and he vanishes just as Yuya arrives. Masumi thinks Yuya is the Dark Duelist, but is distracted and led away before she can take action.