At the wedding of pro duelist Brook Walker, Anna catches the bouquet containing the spell card, Devoted Love, but she assumes is useless. As Anna decides to visit Yuma during his school's culture festival, Ray informs them of a Couple Duel tournament Umimi and her new husband, Mayday, are hosting, which is said to be Brook's last duel. Wanting to find out more, Anna borrows Tori's school uniform so she can enter the tournament, forcing Yuma to be her partner. Prior to the duel, Brook is approached by Vector in energy form. As Anna confronts Brook over why she wants to quit dueling, they decide to settle things with a tag duel. The duel starts with Brook and Mayday summoning their monsters Unsinkable Titanica and Indestructible Airship Hindenkraft whilst Anna uses Yuma's monster to summon out Gustav Max. Mayday responds by summoning out his Xyz monster, Skypalace Gangaridai, destroying Gustav Max and launching a direct attack at Yuma. (thetvdb.com)