JUL-876 While my wife was on a business trip, I was seduced by my sister-in-law Sumire and had intense in-and-out sex until all the semen I'd accumulated over 30 days was gone... Mizukawa Sumire

I work for an IT-related company and I live apart from my wife. Due to her work, her wife has a lot of long business trips and sometimes comes back and asks as if to relieve her anger, and my stress and libido were increasing day by day. I had a good sister-in-law, Sumire, who often came to my house without my wife. One day, Sumire kisses me when I'm talking about small things while having a drink as usual. And with a mischievous expression, she whispered to me, "I wish I could continue this for a month...".