Currently in her third year of marriage, 28-year-old married woman Yuko-san (pseudonym) married her husband as a virgin because she disliked men due to the trauma of sexual bullying she suffered from a group of male classmates during her student days. Until then, she had never even masturbated, and she had lived thinking that sex was an act allowed only between her and her husband. She had no knowledge of nighttime activities because she had lived her life trying to stay away from anything related to sex as much as possible. She always simply accepted the acts requested by her husband. But... I realized after getting married that my husband wasn't a normal person with normal sexual tastes. The requests gradually escalated, and before I knew it, it was no longer a normal married life. And now, Yuko-san, who has been completely trained as a masochist, is spending her days being lent out to other men as a slave. The night before the loan training, she is always locked naked in a cage and ordered to come into heat like a bitch with lewd fantasies...