So sad, huh?A long time has passed, supernatural phenomenon have become common knowledge in this land.
In conflict even though they live in the same place; getting closer even though they are hostile to each other.
The balance of awareness has been attained smoothly, just as planned.A single sigh from an Oni could steal a human's life.While the existence of the Oni has been dimmed by the flow of time, there is still fear that their existence will destroy the current balance.