In recent years, there have been many reports of some organizations secretly preparing drugs and stimulants under the guise of pharmaceutical companies. Nanami is an elite investigator of the country who has been assigned to investigate this case. After a long time, she finally found out where they were produced. In order to penetrate deeper, Nanami posed as a volunteer to test the drug and succeeded. But the medicine they gave her made her stunned, unable to control her body. Meanwhile, she was sexually assaulted by their boss and couldn't fight back. After regaining consciousness and returning, she accidentally discovers information about all the activities saved on the boss's computer and there is another mysterious character behind him. She was determined to sneak into their organization again to steal information, but unfortunately she was discovered. And now she knew why she was always slower than them, why they could always mysteriously disappear without leaving a trace. And that's when the effect of the aphrodisiac they had just produced was at its maximum, causing her to gradually lose her reason, lose herself and become a sex slave to them, like the other women they captured...