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.

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.

So sad, huh?

A single sigh from an Oni could steal a human's life.