A nuclear attack has destroyed the world as we know it. The year is 2419. Japan is a dark and grim place ruled by demons. Once glorious, biggest cherry blossom tree is now dried and darkened. The one main rule is ----- ANGELS ARE FORBIDDEN!
A young woman, carrying the baby, is chased by black suited demon lead by Daiki Soma. The woman and her baby are saved by a dog who spouts tentacles with Daiki referring to it as a "traitor". The woman leaves the baby in a dumpster where it is found by the dog and the woman is captured and killed by Daiki. Years later, the baby, now a grown young 13-year-old girl named Yuri, lives in a run down apartment with her cat friend friend Kagura and their numerous cockroaches who act as their "pets". While making a delivery, Yuri spots a handsome young boy, and is suddenly struck by a truck, resulting in her losing his job. The next day while hanging out with their dog-like friend Inu, Yuri
begins experiencing headaches and visions with certain people displaying misshapen tentacle shadows. The trio realize they are being chased by hellhounds and manage to defeat and outrun them.