" In the real world, the Ocean Turtle, where Asuna and others are located, is under attack, and most ominous of all, Kikuoka changed from a yukata into a Hawaiian shirt… "

― Reki Kawahara , ソードアート・オンライン 15: アリシゼーション・インベーディング [Sōdo āto onrain 15: Arishizēshon Inbēdingu] (Sword Art Online Light Novel, #15)