Touma Kamijou can't catch a break. After the invasion of Academy City, political tensions continue to rise as both the science and magic factions collide head on. It appears that Academy City intends to declare war against the Roman Catholic Church, consequently plunging the whole world into global warfare. Touma soon finds himself on the front lines once again, striving to protect his friends and allies.

Toaru Majutsu no Index III serves as the last installment of the original franchise as Touma, Accelerator, and the true Level 0 Shiage Hamazura continue their separate journeys, leading up to the final act of the original light novel series.

[Written by MAL Rewrite]

In Terra Formars Revenge, the crew members of the Annex I continue to fight against Terraformars—the large humanoid cockroaches that evolved from the ones sent to Mars centuries ago. However, far from discovering the cure for the lethal Alien Engine Virus that has been plaguing Earth, the Annex I team have learned that some squadrons have agendas from their own countries. Now, the squadrons must not only fight against the Terraformars for their survival, but also each other in the never-ending battle for international dominance. [Written by MAL Rewrite]

After successfully returning to Earth on the renovated Stratos 4, the four main characters are visited by the Comet Blasters Chizuru Kubo and Annette Kerry, who bring them a shocking video. Meanwhile, Orbital Station 7 is in serious trouble... This two-episode OVA comes between the first and second seasons.

Nana Suzuki winds up being split into seven copies of herself. Besides the original Nana, there's also a smart Nana, a happy Nana, an angry Nana, a sensitive Nana, a sad Nana, and a slow Nana. (Source: ANN)