Originally a part of the presentation for the series during the Anime Contents Expo in Japan, the official site has added the promotional video from it for A Certain Scientific Railgun S. The series is set to debut in Japan on April 12th, but nobody has stepped up in terms of simulcasting the JC Staff series (yet). The promo runs for a minute and a half and features a good chunk of the new opening song from fripside, which has already garnered a lot of fan attention.
Plot Concept: 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: ANN]
