As Rin and Lulu suddenly turn against Yugo and Kite, Aster arrives with Shay, who reveals that the girls are being controlled by parasitic monsters created by one of the Duelists within Leo's inner circle known as Dr. Buggenstein. Meanwhile, Declan explains to Yuya and the others about Leo's project, Revival Zero, which seems to involve Celina and Yuri. He suspects that Yuya, Zuzu, and their lookalikes are also a part of Leo's plan. As Rin duels against Yugo, she uses a Fusion Parasite to Fusion Summon Windwitch Crystal Bell and destroy Yugo's Duel Runner. Yugo tries to beat her using Crystal Wing Synchro Dragon, but this is not enough to free Rin from her mind control and results in his defeat.