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!

A certain unlikely hero... August 31. The day Accelerator meets a strange girl in a back alley and he's sure he's seen her somewhere before. The day Mikoto Misaka finds herself asked on a date by a very pleasant young man. That same day, Touma Kamijou awakes with an especially unlucky feeling. The reason: He's just realized he has completely forgotten to do any of his summer homework. Three characters, three stories, and one last day of summer vacation!

Seven days have passed since the start of the Daihasei Festival, one of the biggest events of Academy City. Everyone is participating--Seiri Fukiyose is helping coordinate the games, Komoe Tsukuyomi dresses for the part as she cheers for her students, and of course, famous Mikoto Misaka is blowing away the competition. Even Kamijou has appearances! But a shadow has fallen across the celebrations: The Croce di Pietro. This magical artifact threatens the livelihoods of everyone Kamijou holds dear so he dashes off to try and bring Academy City back from the brink. But Oriana Thompson, the magician known as Route Disturb, and the Roman Catholic Church are determined to bring the bastion of science to its knees. Kamijou is going to need all the help he can get-and some luck for once wouldn't hurt!

A Cry for Freedom As Tsukasa and the other Prodigies prepare for the Republic of Elm’s first-ever election and the transfer of power to the public, a new problem arises in the form of Princess Kaguya. The ousted royal is from Yamato, a nation subjugated by the Freyjagard Empire. She pleads that if the Prodigies truly believe in equality for all, then they must help liberate her country. Not everyone agrees that aiding Yamato is a wise decision, however. And no matter what Tsukasa decides, the choice will impact the future of the world…and his friends!

Working hard or hardly working?Miyako has gotten a part-time job in GF Bunko’s editorial department, thanks to the recommendation of Itsuki’s editor, Toki, but she had no idea how much work it would entail. Wrangling manuscripts from troublemaking authors, modeling for manga (in the nude), providing inspiration for Nayuta (also in the nude), drinking parties, ridiculous demands from authors and editors...How will she hold up?!

Hachiman's summer break is coming to a close, when Yui suddenly comes to visit his house. Not only that, but Totsuka has an invitation for him, as well as a request from a classmate--he even runs into Yukino's sister at the fireworks festival! Hachiman is determined not to get close to anyone or have any expectations, but even this stubborn loner can't ignore the changes occurring in his relationships with Yukino and Yui...

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!

As the dust settles from their encounter with the Freshman, Touma Kamijou, Shiage Hamazura, and Accelerator finally cross paths in Academy City. It won’t be long before these three find themselves with yet another challenge on their hands—explaining what the heck they’ve been doing to everyone who was worried about them! The boys have survived more than one scrape with death but it’s anyone’s guess if they’ll live through this...

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...

A certain unlikely hero...No one was able to stop Second Princess Carissa's plot in time, so the worst has come to pass: London has fallen. The city of magic, home to the English Puritan Church and Index, now rests in the hands of the Knight faction. Soldiers control nearly every critical part of the country, commandeering the very streets of the capital. Still, the Puritan sorcerers haven't given up the fight just yet!As the battle for the UK rages on, Touma heads to Folkestone to save Index-only to run straight into the coup d'état's mastermind herself! Worse, Acqua is still alive, and his holy sword, Ascalon, is pointing not at Touma but at Carissa!