My wife's sisters came to Tokyo to take their exams. One of them is taking the exam, and the other is doing some prep work and attending a cram school for next year, so they decided to stay with us for a week. I set up cameras all over the house to take pictures of my sister-in-law's upskirts, but they soon found out and found out my weakness, threatening to tell everyone, and used me as an outlet for their sexual desires. With me at home working remotely, my sisters' lewd pranks escalated, and I was made to cum every day, day and night.