Summer vacation is over, and it's time to go back to school! The new school year brings a new friend for Index--the lovely, thoughtful Hyouka Kazakiri. But there's a new problem too, and it's tall, blond, and ready to ruin Touma's day--the terrifying magician Sherry Cromwell!

Touma Kamijou just can't catch a break. He might live in Academy City, a place full of more super powered students than you can shake a stick at, but his only superpower is his supernatural lack of luck. He wants nothing more than to keep a low profile, but when a girl named Index comes into his life, it gets more complicated and dangerous than ever!

Mikoto Misaka is a Level Five esper--one of the most powerful in Academy City. She's so powerful, in fact, that her DNA has been harvested to create a series of clones--the "Sisters." But who is behind these clones, and why would they go to such lengths? The sinister truth is nothing she or Touma could have imagined, and it involves the terrifying Accelerator, the most powerful esper of all time!

Item’s battle comes to a head as their hideout is raided, and the team reaches its breaking point. Disgusted with Mugino’s disregard for the other members’ lives, Hamazura finds the resolve to stand up to her. Mugino may be a Level Five, one of the strongest espers in Academy City, but she’ll see that even a powerless Level Zero like Hamazura can put up a fight when his back is against the wall!

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!

Touma Kamijou's life is one of perpetual misfortune, which is why no one is more surprised by his sudden stroke of luck than Touma himself! Having won a trip for two to Venice, the City of Water, Touma and Index are excited for a European excursion. But the Italian peninsula is the home of the Roman Orthodox Church, and when old friends and foes alike show up, Touma's hopes for a relaxing getaway might just get washed away!

For Touma and Index, a reunion with an old ally means getting involved with one of the most dangerous objects in existence! The Book of the Law spells the end of the world, and central to this conflict is a nun who can decipher its apocalyptic contents! It's up to Touma to rescue her, but will that mark the end of his troubles...or just the beginning?

Acqua of the Back, saint and member of God’s Right Seat, issues a challenge to the English Puritan Church and Academy City: He’s coming for Touma’s right hand and will crush any who get in his way! Itsuwa is dispatched as a bodyguard, but how will Touma explain this new unexpected houseguest to Index?

Touma has been called out by Mikoto to fulfill his punishment, but can anyone call taking pictures together and getting matching cell phone straps "punishment"...? The arrival of Mikoto's "little sisters" makes their "battle" even more fraught!

To quash an attack by God’s Right Seat on Academy City, the mysterious Aleister Crowley will utilize even the corrupted power of an angel. But when Touma discovers that angel’s identity, he’ll stop at nothing to save her. Meanwhile, Accelerator is on a mission of his own to rescue Last Order from the ruthless Kihara. Could these seemingly unrelated battles actually be two sides of the same coin…?!