とある科学の超電磁砲 (Toaru Kagaku no Choudenjibou), read as Toaru Kagaku no Railgun (レールガン), lit. A Certain Scientific Railgun.
A spin-off manga of the Toaru Majutsu no Index light novels that focuses on Misaka Mikoto and Shirai Kuroko, with art by Fuyukawa Motoi. Currently serialized in Dengeki Daioh; there is also a 2009 anime adaptation by J.C. Staff.
Avoid tagging images with Toaru Kagaku no Railgun unless they depict Railgun-only characters or events.