That's right, and it's titled 'Toaru Kagaku no Railgun S', or 'A Certain Scientific Railgun'. The story continues the Sister arc.
Here's the trailer:
Here's the trailer:
Blog - Cosplay
anime news
toaru kagaku no railgun S anime
toaru majutsu no index anime
Spring Anime Preview 2013: Sequel to To Aru Majutsu no Index premieres on April 12