Three Stories Arc

The Three Stories Arc is a story arc that occurs in the Toaru Majutsu no Index storyline. The arc focus on three separate event that happen on August 31; two stories focuses on Touma dealing with magicians while the other focuses on Accelerator dealing with the aftermath of the Level 6 Shift, which would mark the first time Accelerator is featured as a protagonist to the science side.

Aftermath of Level 6 Shift
Main Article: Level 6 Shift

After the defeat of Accelerator by the hands of Touma, the level 6 shift experiments involving the 20,000 sisters had finally ended. As a result, Amai Ao - investor and director of the experiment - is heavily indebted after the failure of the project and installs a virus into the 20001st sister Last Order. As part of a self-defense program, Last Order breaks out of her incubation chamber in order to seek the help of Accelerator.

Yamisaka Ouma
Main Article: Yamisaka Ouma