. "2013-10-19"^^ . "12"^^ . "Yui no Kokoro"@en . . "Yui's Heart (\u30E6\u30A4\u306E\u5FC3, Yui no Kokoro?) is the twelfth episode of the Sword Art Online anime adaptation, as well as the twelfth episode in the Aincrad Arc. It aired on September 22, 2012."@en . . . . . "Aincrad"@en . . . . "Yui's Heart (\u30E6\u30A4\u306E\u5FC3, Yui no Kokoro?) is the twelfth episode of the Sword Art Online anime adaptation, as well as the twelfth episode in the Aincrad Arc. It aired on September 22, 2012."@en . . "Yui's Heart"@en . "\u30E6\u30A4\u306E\u5FC3"@en . . "2012-09-22"^^ . "2013-09-17"^^ . . "Sword Art Online Episode 12"@en .