Humans, demons, and flawless creatures jointly rule this world. In order to ensure the harmonious coexistence of the three races, humans initiated the establishment of a "Security Bureau" to manage and rule. The three races within the Security Bureau equally share the power, and everything is developing towards a beautiful and peaceful world.
And under this calm surface, another wave of forces has quietly arisen.
All this tranquility was broken was just a feather from the nightingale.
Intention: Entanglement of love and hate