Female investigator Moka begins an undercover investigation after receiving intelligence linking the human trafficking organization Sagi-kai with Sawaki Clinic, known for experimental drug development. However, she is quickly captured. Though she manages to evade her guards and briefly resumes her investigation, she is soon recaptured. Moka is then used as a test subject for the clinic's new drug, subjected to repeated sexual assault. Violated by Dr. Sawaki and then by Sagikawa of Sagi-kai, she suffers deep psychological trauma and develops chronic drug dependency. From then on, she lies on her bed daily, masturbating compulsively, endlessly craving the sensation of a man's cock.