The Mysterious Card Shop - S1.E6

Aichi and his friends decide to go to a different card shop called PSY. There, they try out the shop's special Vanguard Fight Stage. It oddly reacts to Aichi, which leads to a woman, Kourin, challenging him to a cardfight. When the two begin the battle, Aichi is surprised that the stage brings the cards to life. Aichi and Kourin, who both use a Royal Paladin deck, continue their battle, until Aichi makes a bad decision in not guarding one of her Vanguard's attacks, ultimately leading to his defeat. Afterwards, another woman, Suiko, gives Aichi the card The King of Knights, Alfred as a special memento for visiting the card shop. Later, Aichi learns from Morikawa that the card shop they visited has disappeared.