Deadman Wonderland: Akai Knife Tsukai
English name: Deadman Wonderland: The Red Knife Wielder
Genres: Action, Horror, Sci-Fi
Type: OVA, Episodes: 1
Aired: Oct 8, 2011
Studio: Manglobe
Source: Manga
Rating: R - 17+ (violence & profanity)
Synopsis:
Two years after the catastrophic tidal wave that swept over Japan, police officer Kiyomasa Senji is trying to make the world a safer place. Using his Branch of Sin powers, he stops criminals in whatever ways he can. After rescuing a boy named Izuru Tsukiyoshi from a gang called Goreless Peace, the conflict between Kiyomasa and his adversaries heats up rapidly, to the point of being explosive.

Offering a glimpse into the past of the future Deadman, the story follows Senji, helping to further develop the reasoning that drives his actions later in life.