Plot Summary:

Ganta Igarashi has been convicted of a crime that he hasn't committed, and sent to a new, privately owned and operated prison, where the inmates are the main attraction in a modern day twist to the gladiatorial coliseums of ancient times. Throw in a healthy dose of weird little girl, some new-found super powers, and a little conspiracy theory, and you have Deadman Wonderland.

OVA - Kiyomasa Senji was a policeman before he was arrested and imprisoned in Deadman Wonderland. His abilities during his time as an officer caught the eyes of a gang that wishes to recruit him.