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This time's masochistic female volunteer is a 23-year-old caregiver. While in high school, she was repeatedly molested on the train to school, but rather than being put off, she found herself enjoying it, realizing she was a pervert and a masochist. After graduating from junior college, she joined a care company where her boss, the care manager, was a sadist and engaged in an affair in which he subjected her to sexual training. However, her boss was transferred, and she spent her days in frustration, masturbating constantly, remembering the incident...