Synopsis: Continuing after the Level Upper incident, another phenomenon torments Misaka. A phenomenon called "Someone's Watching," its effect feels like the electricity in one's body flow backwards. With the help of her friends, Misaka fights against the unknown enemy. =Alternative Titles= Synonyms: Toaru Kagaku no Choudenjihou, A Certain Scientific Railgun EX OVA =Japanese: とある科学の超電磁砲(レールガン)