an anime series based on the manga of the same name, which in itself is a spin-off of Kazuma Kamachi's light novel, manga and anime series A Certain Magical Index. The manga is serialized in Dengeki Daioh and is written by Kazuma Kamachi and illustrated by Motoi Fukuyama. Set in Academy City before and during the events of A Certain Magical Index, the plot focuses on Mikoto Misaka, an electromaster who is the third strongest esper in Academy City, along with her friends; Kuroko Shirai, a Teleporter and Mikoto's roommate, Kazari Uiharu, Kuroko's partner in Judgment, the city's public safety committee and Ruiko Saten, Kazari's friend and classmate.