Jinkaku Haisetsu: Jinsei Shuuryou Chiken Monitor

Three high school girls, tempted by the promise of easy money, sign up for a well-compensated clinical trial without a second thought. They readily consume the medication provided, unaware of its true nature. Under the drug's influence, they begin to lose their inhibitions and sense of self, their personalities gradually eroding as the experiment takes hold.

A sharp female police officer catches wind of suspicious rumors surrounding the trial and decides to infiltrate it as an undercover investigator. Posing as a participant, she observes the disturbing changes in the girls and works to gather irrefutable evidence of the illegal operation. However, her cover is blown when she is discovered by the staff, leading to a tense confrontation that puts her own identity at risk.