The Third World War that the final member of the Roman Catholic Church's secret organization God's Right Seat Fiamma sparked from Russia has been ended by the efforts of Kamijou Touma. With that, he vanished. With the Magic side regrouping, the Sabbath for their followers has arrived. In the headquarters of the Science side, Academy City, the strongest Level 5 esper, Accelerator has washed his hands of the "Darkness". Along with Last Order and Misaka WORST, he passes both noisy and gentle, calm days. There is no sign of GROUP. Skill-Out's Level 0 Hamazura Shiage, with the negotiating materials he acquired in Russia that pertain to the Darkness, has returned and formed the new ITEM with Kinuhata, Takitsubo, and Mugino and began their operations. Peace has come to the hands of the alumni of the city's dark side at last. However, a new evil "Freshman" appears before them. --- This is a follow up to the popular Toaru Majutsu no Index light novel series, where Kamachi-sensei has promised to deliver new premises and give a totally new flavor to the fights and plot developments.