'" The Daihasei Festival may be all fun and games (and explosions), but the chaos of the competition also serves as a distraction. A dank conspiracy lurks behind the event, and it ensnares one of Misaka''s “sisters.” When Misaka tries to investigate, the enemy proves to be more complicated–and ruthless–than she first guesed. Judgment is cripped. Misaka''s back may be up against a wall, but some of her other friends prove to be powerhouses in their own right. "'

In the final battle against the Accelerator, the truth cuts like a knife, while romance blossoms between Misaka and Touma. Meanwhile, Tokiwadai Middle School welcomes its newest student, the egotistical Kongou Mitsuko, who immediately sets off a power struggle among the student body as she seeks to form her own faction. While tensions run high at the school, what better time than to throw a sports festival? It may sound like all fun and games, but Academy City is about to see an explosive competition the likes of which it's never known before!