My sister-in-law Azusa has returned from Tokyo after four years, and while she still has all the innocence of her school days, she has become a woman who exudes sensuality. One morning, I went to wake her up, and we crossed the line. From then on, even though my wife was right there, she whispered seductively in my ear, asking for my cock. One day, she even showed me her masturbation from behind the sliding door. The moment my wife left her seat, we passionately desired each other. Azusa would go home after the holidays were over, and I told myself that our relationship was only until the holidays were over, so I enjoyed every inch of her young body.