To Aru Kagaku no Railgun (A Certain Scientific Railgun) is a side story to last year's anime To Aru Majutsu no Index (A Certain Magical Index), both of them being adapted by studio J.C. Staff. As opposed to the first series, however, Railgun is based on the spin-off manga derived from Kazuma Kamachi's original novels. This time, the story focuses on Misaka Mikoto one of the Level 5 psychics in the 'Index light novels.