At a certain medical facility, rumors circulate about illegal clinical trials being conducted under the guise of short-term paid research—experiments involving powerful aphrodisiacs. The targets are innocent, naive female college students, exploited by rogue chemists engaged in illicit activities. Four newly developed aphrodisiac drugs are administered one after another into Suzu's unsuspecting body, gradually overwhelming her system and exposing her to a twisted blend of pleasure and agony. This is an extreme, cruel depiction of a female college student's four-day ordeal as a helpless test subject caught between justice and evil.