27-year-old Natsumi Hayasaka is a capable businesswoman who runs two relaxation spas. Her youthful appearance and radiant skin, resembling someone in their early twenties, are her charms. She entered the adult video industry not for a specific man, but because she wanted to experience sex with various men. Believing AV was the quickest way to fulfill this desire, she decided to audition. Though she's only had two official relationships, she's slept with over 50 men—proof of her extreme sexual experience. There are even stories of her deliberately arousing attractive male clients while working at her spa, giving them suggestive massages, and then having sex after they got erect. Even just her touch causes intense physical reactions—her body twitches and she moans involuntarily, the perfect image of a perverted older sister. When a hand slips into her panties, her vagina is already dripping wet. What kind of wild experience awaits when a cock is finally thrust inside Natsumi Hayasaka?