とある科学の超電磁砲
On August 21, 2013, fripSide released their 7th single, "Eternal Reality" which was used as the second opening theme for "A Certain Scientific Railgun S". The single was made in collaboration with Tetsuya Komuro for its composition and arrangement and was released into 3 editions, the Regular (CD only), Limited (CD+DVD edition) and Anime editions.