One day, female college student Riko Sugawara applied for a part-time job described as testing medication for research purposes. She was told the drug was not dangerous, so she drank it and gradually lost clarity of consciousness. When she tried to resist, she was forcibly restrained. Then she was subjected to intense sexual torment, followed by a demonic drug injected into her anus, making her climax repeatedly through skilled hand techniques and finger stimulation. What will become of this female college student's fate as she undergoes further torment with attachments and drill stimulation? Will she be completely dominated under the aphrodisiac's influence?