Housewife Nozomi lives with her husband, father-in-law, and their newborn child. Since early in her marriage, she has been caring for her father-in-law while secretly indulging in repeated affairs, revealing her deeply promiscuous nature. Though being trained and dominated by her father-in-law, she murmurs inwardly, "I can't betray him any further..." Yet her body trembles intensely under his touch, lactating uncontrollably as she instinctively grinds her hips. Forbidden desires and inner turmoil tear at Nozomi as she struggles between infidelity and family, all depicted through intense, passionate sex scenes.