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!

The head of the English Puritan Church, Laura Stuart, has summoned the Index Librorum Prohibitorum with a mission to investigate the bombing of the Euro Tunnel that connects the UK with France. Index soon departs for the British Isles with her guardian Touma Kamijou in tow but their when their flight is suddenly hijacked by a mysterious figure, their plans will have to change! If they survive, Index and Touma's next unfortunate adventure will lead them to the heart of the UK!

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!

TIME-ATTACK CHALLENGE! ​Pristella is minutes away from disaster, and Subaru is the only one who has any idea what's coming. Sirius, the Archbishop of Wrath, intends to use her insidious power to commit an act of terror—in the name of love. To have any hope of saving the city's residents, Subaru will first need to figure out how to handle the shortest time limit that Return by Death has ever given him. Will his powerful allies and newfound skills be enough to keep the Water Gate City safe from catastrophe?

RISE AND GRIND! ​Desperate to protect those close to her, Zena approaches Satou with a simple wish: She wants to become stronger. Naturally, Satou agrees to help, and he and his party subject her to training so rigorous the other explorers can hardly believe her growth. Not one to be left behind, however, Karina enrolls herself in their Labyrinth boot camp as well! But they’ll need to be quick about it. Satou is due in the royal capital, and if his luck is anything to go by, it’s only a matter of time before trouble rears its ugly head!

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!

It's summer break, and Hachiman is continuing his leisurely life of solitude-until Miss Hiratsuka forces the Service Club back together to volunteer at a campground. For some reason, Hayama, Miura, and their crew of normies are there, too... Thus begins a compulsory, youthful season of fireworks, tests of courage, nighttime conversations, and bathhouse incidents, with no escape for Hachiman. Summer is indeed a minefield for the loner...

A certain unlikely hero... As battles rage around the world, three boys continue to dash through the fires of Russia. Takitsubo is still suffering, and with no cure in sight, Hamazura relies on a chance encounter and a borrowed jeep to find what he needs in Elizalinan territory. Already there is Accelerator, who awoke in a field hospital after his defeat at the hands of his weakest and most worthy opponent. Though Last Order is no better than before she and Accelerator arrived, it might be just the right place to learn how the occult parchment ties into everything. Back across the border in war-torn Russia, Kamijou is about to infiltrate another military base to finally corner Fiamma. That's easier said than done, though, when two enormous angels turn the entire area into a battlefield!

In the shadows of Academy City, the special team known only as Group is hard at work to solve yet another incident. The Level 5 esper Accelerator and the man who controls both supernatural and magic powers, Tsuchimikado, are investigating a case where their only clue is the word "dragon." While they struggle to find a way to make progress, a member of Academy City's board of directors bears a terrible grudge against them. Once again, Group finds themselves on the business end of a fearsome weapon!

A certain unlikely hero... Fiamma's plans have finally been set in motion. His ultimate creation, the massive Star of Bethlehem, dominates the skies over Russia. Now he stands ready to purge everything and everyone unnecessary to his grand mission to save humanity. Down below, sorcerer, soldier, and student alike are fighting for their lives against a new calamity that threatens the entire world. After following Fiamma so far for so long, Kamijou knows that there's only one way to put an end to this crisis: Defeat Fiamma and destroy his flying fortress-even if it means challenging God's Right Seat all alone. Rotten luck or not, Kamijou has to do it. After all, Index is still waiting for him...!