A woman with nothing left to lose hunts demons in the human world as punishment and redemption wrapped into one sentence. The 1989 OVA format means this is 45 minutes of pure, unbuffered violence, no time for philosophy, just a being from hell doing what she was made to do. You watch someone literally paying off a cosmic debt in blood, and the show never blinks about what that costs her.
Yama Rikudou is a powerful being from the underworld. After being pardoned for peering into the past life of the person she loved, she is dispatched to the human realm to hunt demons. Her task is to wipe out the evil spilling over into this world and restore some balance. Posing as a high school student and armed with a huge scythe, she works as a kind of demon police officer, stopping rogue monsters that threaten Japan. When her superiors try to recall her because relations between demons and humans are becoming too volatile, she refuses to leave, having fallen for her classmate Sho Kurogane. Now she must protect Sho and his friends from the school's headmistress, who drains souls in pursuit of eternal youth. The result is a single-episode OVA that mixes action, horror and the supernatural.