The opposite bank of Lethe River is Boundary Realm with all night along, keeping the balance of the world’s deaths by ghost messengers. Black and White Warriors are ghost messengers collecting spirits from the Human Realm. Xiaohei and Xiaobai, a pair of Black and White Warriors at the bottom, whose relationship became delicate after experiencing the incident happened inside One Hundred Ghost Great Seal. At the same time, Xiaobai’s true identity began to surface…

A story about two young demons who are always slacking off at work, a place that happens to be an organization that vows to keep the balance between the worlds of the living and dead by killing humans! (Source: Cave Scanlations)

The series follows Officer Black Cat's adventures around the forest neighbourhood, apprehending criminals, dealing justice, and solving crimes.

Eight hundred years ago, terrifying demons threatened mankind's existence. On the brink of extinction, humans prayed to their gods, calling out for someone to save them. Emerging from these desperate pleas for salvation, battle deities known as the Idaten were born. Possessing unnatural strength and endurance, the Idaten managed to defeat the demons and an era of unprecedented peace was finally ushered in. Having never encountered demons before, the present generation of Idaten knows nothing of the demon's brutality, but they have instead only lived a peaceful existence. Training under Rin, the only remaining Idaten from 800 years ago, the new Idaten find ways to survive in a time where they have seemingly outlived their usefulness. However, when the tyrannical Zoble Empire resurrects a demon, the misfit crop of gods are called to the battlefield against their natural enemy once more.