In recent years, there have been many reports on the fact that a few secret organizations preparing drugs and stimulants under the cover are pharmaceutical companies. Nanami is an excellent investigator of the country assigned to investigate this time. After a long time, she finally found their production place. To be able to penetrate deeper, Nanami pretended a volunteer to test the drug and succeed. But the medicine they used for her made her stunned, unable to control her body. Meanwhile, she was sexually assaulted by their bosses that could not resist. After waking up and returning, she accidentally discovered the information about the entire activity stored on the machine of the boss and behind him also had another mysterious character. She was determined to sneak into their organization again to steal information but unfortunately was discovered. And now she learned why she was always slower than them, why they could always disappear mysteriously without leaving any trace. And that's the time when the effects of the newly produced assault drugs maximize the maximum efficiency, causing her to gradually lose her mind, lose herself and become a sex slave of them, like other women who were captured by them ...