In recent years, there have been many reports of some organizations secretly manufacturing drugs and stimulants under the guise of pharmaceutical companies. Nanami, an outstanding investigator of the country, was assigned to investigate this case. After a long period of time, she finally located their production site. In order to infiltrate further, Nanami disguised herself as a drug test volunteer and succeeded. However, the drug they gave her caused her to be disoriented, unable to control her body. During that time, she was sexually assaulted by their leader and could not resist. Upon waking up and returning, she inadvertently discovered information about their entire operation stored on the leader's computer, and behind him was another mysterious figure. She was determined to sneak back into their organization to steal information but was discovered. It was then that she realized why she was always one step behind them, why they could always disappear mysteriously without a trace. And that was when the effects of the new aphrodisiac drug they produced began to take full effect, causing her to gradually lose her rationality, lose herself, and become a sex slave of theirs, like other women they captured...