Aoi Mizutani starts working as a rookie nurse at a small private clinic. One day, she witnesses a senior nurse giving a blowjob to a patient. She soon discovers this sexual act is part of a scheme for fraudulent medical billing. Caught at the scene, Aoi is forcibly injected with an aphrodisiac, subjected to sexual training, and raped. Despite her own will, her body involuntarily responds to sexual stimulation. Ultimately, she is forced into a role where she must service patients' sexual needs as a sex slave.