On the weekend shift for an underground part-time job, she received sudden instructions from the store manager. Taken to a room separate from the changing area, she was told to sit up on a simple bed. Closing her eyes, she pulled down her panties, lifted her legs, and spread her thighs apart. She felt his intense gaze fixed on her as she got on all fours, presenting her buttocks, while he examined the color and shape of her anus. Surprised by these unusual instructions, she had no choice but to follow the rules of the underground job. Then, hearing the words, "We need to test your bodily fluids, so masturbate," her confusion deepened. Her body reacted to the unfamiliar situation, slick fluid beginning to drip. The awareness of being watched felt stronger than ever, causing her secretions to flow increasingly. Overcome by shame, she couldn't even open her eyes—every moment filled with intense tension.