Norageki! (ノラゲキ！, lit. "Five Numbers!") is an OVA made by Sunrise. Only one episode has been released.
Plot
The story is set in a certain isolated prison with four prisoners and a cat. One day, a sudden power outage opens the locks and everyone is mysteriously set free from their cells. However, all of the guards are missing, and the prisoners cannot find any exits.
External Links
Official
Other Sources
Other Wikis
References