Aoi Mizutani has just started working as a new nurse at a small private practice. One day, she witnesses a senior nurse giving a patient a blowjob. It turns out that she was providing sexual services in order to fraudulently claim medical fees. Mizutani is injected with an aphrodisiac, trained, and raped, and ends up working as a sex slave to satisfy the patients' sexual desires. However, against her will, her womanly body feels it and accepts it.