Accel World - S01

Some time after the events with the Burst Linker Dusk Taker, Kuroyukihime remembers bringing Haruyuki Arita into "Brain Burst," an application that lets players speed up their thinking until time seems to stop. Since he joined, Haruyuki has become well known among the other Burst Linkers and has helped Kuroyukihime work toward her goal of reaching the game's highest level. During a territorial battle with their legion, Nega Nebulus, Haruyuki and his friends are forced out of the program after a destructive in-game storm. Across Tokyo, security cameras are malfunctioning, and Kuroyukihime concludes this is tied to the Brain Burst glitch. Set on fixing the problem, Nega Nebulus has to bring in the other legions to track down the source of the issue and restore the acceleration ability.