No matter what age the world is in, the Bullied Child will never disappear. The overweight, middle school student, Haruyuki, was one such kid. The only time he could relax completely was when he would play a squash game on the local network the school had set up. He loved playing this simple game as he could forget painful times while immersed in it.
Then came fall. He kept passing his time like this, until one day he had an encounter with the school's most beautiful, refined girl, the "Black Snow Princess" (Kuroyukihime). This encounter changed his life abruptly. Introduced to the software she transmitted, Haruyuki learned about Accel World: a program that enhances one's mental capabilities, with certain side-effects.