In her youth, Ranka Kuroki lived in Tokyo and worked as a fashion sales clerk at a well-known department store. Eight years ago, she married a man ten years her senior, and later moved to Fukuoka due to his job transfer. She currently continues working as a sales clerk at a boutique catering to married women. After giving birth to a child, her intimacy with her husband decreased, leaving her feeling sexually unfulfilled. Influenced by friends and television, she developed a fascination with extramarital affairs, though never experienced one. Unable to suppress her mounting physical desires, she made the decision to appear in adult videos.