As Touma tries to help and protect his friends, he learns the people he knows are not as they appear and begins to attract the attention of magicians and espers alike as they try to unravel the secrets of Academy City and Index. Touma's unusual power places him at the center of conflicts between magicians and science-based espers in Academy City. His encounter with her leads him to meet others from the secret world of science and magic and an adventure with his friends where science and magic collide. She turns out to be a nun from the Anglican Church, and her mind has been implanted with the Index Librorum Prohibitorum - 103,000 magical texts that contain a wealth of information about magic. One day he finds a young girl named Index hanging on the balcony railing of his dormitory room. Kamijou Touma is a high school student in Academy City, with a power called the Imagine Breaker that can negate all magic, psychic, and divine powers, but also his own luck. Toaru Majutsu no Index is set in Academy City, a technologically advanced city located in western Tokyo which studies scientifically advanced superhuman students with powers, but is also set in a world where magic is real. ' A Certain Magical Index: Genesis Testament'), began publishing on February 7th 2020. A further continuation, titled Souyaku Toaru Majutsu no Index ( 創約とある魔術の禁書目録（インデックス）, Sōyaku Toaru Majutsu no Indekkusu ?, lit. ' A Certain Magical Index: New Testament') with twenty-three volumes bearing this title. The light novels span for twenty-two volumes in the main story and two sidestory volumes, after which the series was released under the title Shinyaku Toaru Majutsu no Index ( 新約とある魔術の禁書目録（インデックス）, Shinyaku Toaru Majutsu no Indekkusu ?, lit. The series has been also adapted into an ongoing manga series, which began serialization in Monthly Shōnen Gangan in April 2007. There are currently three season, with the first season airing between October 2008 and March 2009, the second season between October 2010 and April 2011, and the third season between October 2018 and April 2019.

The light novel series has been adapted into an anime series, which was animated by J.C. ' A Certain Magical Index'), is a Japanese light novel series written by Kamachi Kazuma and illustrated by Haimura Kiyotaka the series is edited by Miki Kazuma, designed by Watanabe Hirokazu and published by ASCII Media Works under their Dengeki Bunko imprint since April 2004. 2 (Apocrypha Archive) Toaru Majutsu no Index ( とある魔術の禁書目録（インデックス）, Toaru Majutsu no Indekkusu ?, lit.

A certain magical index