O'Brien has saved Fubuki from Fujihara Yusuke. O'Brien has accepted another mission from I2 and returned to the Duel Academia. Then, Judai duels Fubuki to solve the mystery behind Darkness. Fubuki, borrowing Darkness' power, summons Red-Eyes Black Dragon, and then sacrifices Red-Eyes Black Dragon to Special Summon Red-Eyes Darkness Dragon to launch an assualt on Judai.