During the 2017 Dengeki Bunko Fall Festival, editor Kazuma Miki announced that Kazuma Kamachi’s To Aru Majutsu no Index (A Certain Magical Index) will be receiving a third television anime series! Although we do not know which season it will be airing in, it was announced that the anime will air in 2018 and will be a part of the 2018-Nen To Aru Project (A Certain Project 2018). Atushi Abe and Yuka Iguchi were present and announced that they would be reprising their roles as Toma Kamijo and Index respectively.
Yen Press currently holds the license and is releasing the light novels while FUNimation is releasing all of the anime series which includes To Aru Majutsu no Index and To Aru Kagaku no Railgun. Seven Seas is releasing the manga in North America as well.
MyAnimeList.net describes the story of To Aru Majutsu no Index as the following:
Academy City, Japan, is at the forefront of science. Besides being 30 years ahead of the world technologically, more than three-fourths of this peculiar city’s population consists of students developing their psychic abilities as espers in various institutions. Among these students is Touma Kamijou, a high school boy with the lowest psychic rank of zero, but with a mysterious power no scientist can understand: “Imagine Breaker,” which allows him to negate other supernatural abilities.
This, however, doesn’t affect Kamijou’s life in the least as he plays his role as a regular teenager; that is, until he meets the strange Index Librorum Prohibitorum, a young girl who has memorized the entire forbidden grimoires, and now a dangerous organization is hunting Index down. With several magicians looking to harm the girl, Kamijou will defend his new companion at all costs as he discovers a strange new realm of the supernatural.