Tsugumi became an investigator because she wanted to uphold justice. She met and married a man from an organization that maintains public order through her work, and everything seemed to be going smoothly... However, her husband, who was investigating an illegal substance case involving some organization, suddenly disappeared. Tsugumi infiltrated the hideout alone, relying on clues, and found her husband in a vegetative state. Her husband had been infected with a new type of aphrodisiac that was rapidly increasing the number of addicts through airborne and mucosal transmission. Tsugumi was forced to make mucosal contact (kiss) with him...
