Deadman Wonderland: The Red Knife Wielder

Deadman Wonderland: The Red Knife Wielder
Set two years after the Red Hole incident and eight years before the start of the series, Senji Kiyomasa is a police officer using his Branch of Sin to fight criminals, but has a little temper. One day, he rescues a boy named Izuru who stole from a gang called Goreless Peace. After returning him to an orphanage, Senji encounters Goreless Peace's chairman, Keigo Ugachi...