This video was submitted by a man who is training a brother and sister engaged in repeated incest as his sex slaves, and behind it lies a complex family history. Mari and Yuta (both pseudonyms) are the children of my deceased sister and her husband, who died in an accident. Since my wife and I had no children of our own, we took them in and raised them. My wife was a masochist, and as a sadist, I had trained her as my love slave. After my wife passed away from illness, the three of us—Mari, Yuta, and I—began living together, and it was then that their secret came to light. I was shocked to discover the truth: the siblings had been committing incest. That revelation stirred the sadist within me, and a desire began to grow—to guide them toward happiness. Words like 'Turn both Mari and Yuta into depraved masochists just like XX (wife's name)', 'These siblings are deeply twisted masochists, fucking each other like animals. The XX bloodline is meant to be slaves', and 'You must dominate these two masochists and lead them to happiness' began echoing in my mind. This video submission arrived along with such a confessional letter. It captures the siblings lost in incest, reveals how profoundly masochistic they are, and conveys the deep bond and desire for domination between them. Please witness their transformation.