After the incidents surrounding Burst Linker Dusk Taker, Kuroyukihime remembers inviting Haruyuki Arita into the "Brain Burst" initiative—an interface that lets participants speed up their mental processes until time appears to freeze. Ever since joining, Haruyuki has become renowned among the other Burst Linkers and assists Kuroyukihime in pursuing her ambition to attain the top tier of the game. After the game, Haruyuki also mentors newcomers. Their synergy boosts overall performance.
In a clash over territory with their squad, Nega Nebulus, Haruyuki and companions are expelled from the program following an intense in‑game tempest. Throughout Tokyo, surveillance feeds fail, which Kuroyukihime links to the Brain Burst malfunction. Resolute to resolve the glitch, Nega Nebulus must enlist additional squads to locate the root cause and reinstate the acceleration feature.