Toaru Kagaku no Railgun S
Alternative Title: Toaru Kagaku no Railgun 2nd Season, A Certain Scientific Railgun 2nd Season
Episodes: Unknown
Status: Not Yet Airing
Aired: Apr 12, 2013 to ?
Producers: J.C. Staff
Genres: Action, Fantasy, Sci-Fi, Super Power
Opening: "sister's noise" by fripSide
Ending: "Grow Slowly" by Yuka Iguchi
Synopsis
The second season will focus on The Sisters Arc. Lasting only a single volume in the Toaru Majutsu no Index light novels, it was later expanded greatly in the Toaru Kagaku no Railgun manga.
The arc focuses on the ordeals of Mikoto Misaka after discovering the existence of the Radio Noise sisters that are being used in the Level 6 Shift, an experiment where they are killed in order for the highest-ranking Level 5, Accelerator, can achieve Level 6.
(Source: Wikipedia)