28-year-old Yukiyo-san (pseudonym) was entering her third year of marriage. Due to trauma from sexual bullying she endured from male classmates during her school days, she harbored intense fear toward men. As a result, she had never masturbated before marriage and believed sexual acts were something permissible only with her husband. Lacking nearly all sexual knowledge, she had simply and obediently responded to her husband's advances. However, after marriage, she gradually realized her husband's sexual preferences were vastly different from what she considered normal. What began as mild requests slowly escalated, and their marital relationship began to shift. Eventually, she underwent sadomasochistic training as a masochist and started living a life of being lent out as a sex slave to other men. On the eve of such encounters, she was always locked naked inside a cage, subjected to degrading commands that forced her to become aroused like a bitch in heat—an image so shocking it leaves viewers stunned.