Yami no Shihosha Judge

Hoichiro Ohma is an office worker known for his quiet and unassuming nature, even to those close to him like his girlfriend. Unbeknownst to others, he holds a hidden role: a Judge of Darkness. When a death occurs under suspicious or cursed circumstances, or when a case requires judgment, he intervenes. Using the Laws of Darkness, a book bound in human skin, and an unusual parrot, he delivers verdicts against living criminals who would otherwise escape punishment.