Sword Art Online adapts Kawahara's (Accel World) light novel series of the same name. The story revolves around a boy named Kazuto "Kirito" Kirigaya who enters a virtual-reality, massively multi-player online (MMO) world called "Sword Art Online." There is no escape from this world unless the player clears the game, but "game over" means the death of the player.
[via ANN]
