One day, there was a world full of people who set their annoying rules, a world of people who lie to you for their own gain, a world where money hides events under the term "accidental incident." But is that really true?
Amid all these people, a mysterious figure appeared—an unknown identity, unknown past, unknown face—called Black Mask, a spy pursuing his own goals.
One day, news broke of employees dying under mysterious circumstances—or as they said, "natural causes." But Black Mask knew the truth. He decided to go to the building at night, without anyone knowing, not even leaving a trace that he had been there.
As he arrived, he noticed a person standing, dressed in a completely black suit. When Black Mask caught his attention, the man in the suit covered his nose and said, "It seems you know the reason for the employees' deaths," and then he started laughing. Almost instantly, he vanished.
Black Mask soon realized the employees had died from a poisonous, invisible, odorless bomb. When it detonated, the employees thought it was just a minor explosion due to the mysterious nature of their work.
Black Mask decided to leave a note for the police, describing what had really happened in detail, and then planned to leave after revealing the truth.
But what happened when the police saw the note? Black Mask became an international criminal, wanted at the highest level, because of the precision of his note—they assumed he had committed the act himself.
And that is Black Mask.