``Black Sparrow'', a well-known name in the underworld, is an unknown female spy who targets notorious corporate organizations, exposes their wrongdoings, and disappears. - Her next target is the destruction of "X", which rules the underworld. - Black Sparrow lost his father's life to X, and was determined to avenge him, but... - Her lover was captured by the organization...and without any resistance, he was raped without any help.