A legendary tome known as The Book of the Law, which describes how to summon an angel, has been stolen--and the nun who knows how to decipher it has been kidnapped. All of which should be completely irrelevant to high school student Touma Kamijou, who's still whiling away his time in Academy City. Except his famously terrible luck gets him involved in the rescue operation, and if he thought school life was bad enough, wait until he gets a taste of church politics!

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!

Ririchiyo has decided to make a fresh start, removing the blinders from her eyes and releasing Soushi from his contract. From now on, she has resolved to treat this incarnation of Soushi as his own person and to mourn the loss of the man she loved in a previous life. The change has given Ririchiyo a clear perspective, but Soushi's heart remains clouded. Playing the part of his former self for Ririchiyo's sake was an act--what will happen when Soushi's true feelings come to light...?

Tokiwadai Middle School--a place bathed in the envious gazes of all the schoolgirls in Academy City. Every single one of its female students is a proper young lady, and none more so than Mikoto Misaka. Kuroko--a Level Four teleporter and a member of Judgment, the organization that preserves public order in the city--knows this all too well. She invites her darling Misaka out to go shopping, but that's just the beginning of what ends up being a very, very long day, one in which she sees Misaka's true form and may wish she hadn't...

In London, the women's dorm in a magicians' base get wild, while in the underbelly of Academy City, Accelerator stumbles upon someone who has been waiting for him all this time.

A certain unlikely hero... Ever since the attack on Academy City, the disputes between the magic side and the science side have been getting worse day by day. Now protests have broken out in France, instigated by a sinister magical artifact, and world tensions are nearing their breaking point. Unable to just stand and watch, Touma Kamijou flies off to Avignon in order to use his trump card, Imagine Breaker, but he should be a little more wary of what could be waiting for him in the historic stronghold of the papacy...

What makes a magical girl special? Sakura Kagami is just an ordinary girl, and her magical-girl persona, Prism Cherry, is just as ordinary, too. After the same old tired routine of saving people with her boring magic in a peaceful town, Sakura learns that her classmate, Nami, is also a magical girl. The two of them become fast friends, but it doesn't take long before the veneer of magical-girl-hood falls apart to reveal something more sinister than they'd ever anticipated.