Toaru Kagaku no Railgun OVA
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.
Synonyms: Toaru Kagaku no Choudenjihou, A Certain Scientific Railgun EX OVA