is a 2011 Japanese anime original video animation release.

The OVA was directed by Hiroaki Ando, written by Dai Satō and produced by Sunrise.

[1] It is licensed in North America by Sentai Filmworks, it was released alongside another Sunrise OVA, Coicent, on DVD and Blu-ray on November 22, 2011 on the same disc.

One day, a power outage opens all the locks and all the prisoners are released.

An extraordinary event occurs in response to an old man's strange behavior.