In the year 2026, a young man by the name of Kazuto Kirigaya beat Sword Art Online, a VRMMORPG that had become a death trap for its players. He would go on to participate in experimental tests of an entirely new full-dive machine. Meanwhile in 2047, a boy named Haruyuki accelerates himself in order to finish his homework just before class. But in the Accelerated World, he detects a strange tremor. Checking the matching list, he notices a most un-Burst-Linker-like name: "Kirito." It's Kirito vs. Silver Crow as two of author Reki Kawahara's protagonists clash across time and space--and that's just the beginning!