Although the lights of the city are flashing with people coming and going, and are decorated with fascinating red lights and music, there is always a dark side in the night. In the dark and unkempt corner of the city in the middle of the night, the walls are not white, but are decorated with blood and become pitch black, with a pungent smell of rust. There are still broken wine bottles stained with blood on the concrete floor.
Disputes over money, gambling, and interests, the country's economy is unconsciously controlled by black forces. The police government represents justice but still dare not compete with underground organizations that are more threatening than the world government. Without the people's knowledge, the Japanese police department has long been bribed by a dark underground organization. This dark organization is - "Black Star". As long as you are willing to spend money, they will help you get rid of the people you want to kill. Therefore, many economists and politicians who want to make money will spend a lot of money to entrust [Black Qixing] to kill those who hinder them, but no one knows how to entrust [Black Qixing], because "Black Qixing" will find you first before customers come to your door. No one knows what kind of organization "Black Qixing" is, because the people who thought of investigating them are no longer alive in the end, and everyone who investigated them died miserably and was not human.
At this time, some senior officials in the government noticed the anomalies in society, and some people gradually discovered that there was an organization controlling the Japanese economy, and also discovered that the police department seemed to be bribed. At this time, during discussions among several people, they concealed the methods of the police department and planned to establish an organization that could fight against the "Black Star" without anyone knowing. After a few years, the organization to fight against the darkness was born, that is - "Yu".