This work is an amateur submission originally published in an SM magazine, telling the story of a 38-year-old married woman who goes by the pseudonym ○Nana, as she commits adultery with TK, her husband's close friend. Nana becomes captivated by TK's sexual techniques and transforms into a submissive sex slave. She is stimulated with a vibrator on her vagina, exposing her increasingly lewd and pleasure-driven nature. The film depicts her intense reactions to bondage and whipping, illustrating her descent into becoming a true female masochist.