New nurse Ayaka Mochizuki, blessed with a voluptuous, big-titted body, undergoes a mandatory pre-assignment physical examination. This special checkup, standard procedure in medical facilities, requires complete nudity for body measurements. Blushing but obedient, she submits to the examination in front of trainee doctors. Tests include urinalysis, anal inspection, and vaginal endoscopy—all charged with erotic tension. During her breast cancer screening, her pink nipples are manually stimulated by a doctor's fingers, eliciting sensitive, lewd reactions. The examination escalates to an explicit check using a live erect penis inside her vagina. Overcome by humiliation and arousal, Ayaka experiences intense, full-body orgasms, squirting copiously, yet is ultimately cleared of any abnormalities. Passing this trial, she begins her career as a full-fledged nurse.