Her younger brother was murdered by an unknown assailant... Yuki became an investigator herself to track down the killer. Her investigation into a series of bizarre murders led her to a pharmaceutical company called "BLOSSOM." While it appeared to be a legitimate company, she discovered they were secretly researching devices to control human will. Yuki went undercover as a researcher, but her true identity was exposed. She was then forced to become a test subject for a "pleasure brainwashing experiment" that would erode her very personality...