Haruna-san, exhausted from her busy daily life of part-time jobs, club activities, and group dates, felt unsatisfied with her sex life with her boyfriend and decided to apply, seeking greater fulfillment. Though slightly anxious when restrained to a chair with a collar around her neck, she couldn't withstand the vibrator stimulation, her breasts trembling as she gasped for breath—her reactions growing increasingly erotic. Her appearance perfectly embodies the hidden desires of today's modern woman.