To Aru Kagaku No Railgun (oav)

 After the Level Upper incident, Misaka Mikoto has a strange sensation that someone is watching her. Different from the usual attention she gets, this piercing sensation that makes her feel like the electricity in her body is flowing backwards starts to disturb her greatly. Committed to help her roommate, Kuroko Shirai asks their mutual friends Kazari Uiharu and Ruiko Saten to help solve this mysterious case.

Dialogue : Japanese
Subtitle : English/Off 
Region : All Region, Free Code 
Disc Type : DVD x 1
Series Type : OAV
Episodes :  1