Kokone Mizutani had to stay at her husband's family home temporarily to care for her father-in-law. However, she grew increasingly stressed and distressed by his unpleasant caregiving demands. One night, while masturbating, she was suddenly discovered by her father-in-law. Though she initially resists his aggressive advances, his forceful yet tender touches begin to stir her emotions. Gradually, her resistance weakens, and she finds herself passionately desiring him. The intense emotions and inner turmoil she experiences become the focal point of this forbidden story.