After the Sleeping Knights guild disbands Asuna sets out to find Zekken (Yuuki), who reveals her tragic story.

In the season finale, Asuna, Yuuki as well as all of their friends continue to live happily in the world of Alfheim and New Aincrad. From duels and quests to taking bosses head on, the group is determined to make the most of their time together, by any means. However, when Asuna receives urgent news of Yuuki's condition, the line between her two worlds will become thinner than ever. And she will learn how the human spirit, as well as the love which sustains it, transcends all life.