Countless dungeons that suddenly appeared all over the world. And the mysterious creatures that live there.... more>>

The government of each country were making every effort to investigate and manage "dungeons".

Meanwhile, a new dungeon suddenly appeared in the basement of the Boro family where Touka and Haruka, brother and sister living in poverty!

They begin to explore this dungeon on their own, looking for treasures and meat that monsters will drop … <<less

A strange "real" world appears before the eyes of a boy who has cleared a VR game and returned! The best Musou strategy story, with mysteries and beautiful girls looming, begins here!... more>>

While testing his brand new VRMMO, Kanzaki Reito was trapped inside the game for three years. He defeated the final boss of the game and was finally freed, but what he returned to was something odd happened the real world. A "little sister" of his out of nowhere, Reito can still use the same ability as in the game, and monsters appear. Will Reito make use of his overwhelming power and become the savior of this world?? <<less

To commemorate its 20th year anniversary, that legendary arcade game makes a miracle collaboration with “Index”!... more>>

In Academy City, there is a popular next-generation contest.

In reality, this is a hand-to-hand battle between gigantic Virtuaroids that appear on the streets. It’s formally called as “Computerized War Machine Virtual-On”. Since it can be argued that Level 5s and Level 0s are equal given the technique, it has spread with explosive force among the students of Academy City.

One day, Index with her white Bal Bados, fights Touma’s stock Temjin.

“I’m Ririn. Purajina Ririn. I’m not Ririna… Munya…”

A seemingly insomniac girl arrives at Academy City.

And, Kamijou has an encounter. The usual Virtual-On meets an unavoidable unprecedented accident. That is, the Computerized War Machines fuse with Academy City, a sign of a grand battle about to happen! Misaka Mikoto and her Raiden, Shokuhou Misaki and her Angelan, as well as many others will make appearances! <<less