Tonight, Irido Mizuto had a lewd dream. I immediately realized that this was a dream. I became a existence with only vision and hearing. I kept wandering around the house like a ghost and couldn't even go wherever I wanted. According to the incomprehensible laws in the dream, I would also witness it with my own eyes. My former ex-girlfriend, now the daughter of my parents who became my elder sister because of remarriage, and my biological father Qiufeng, is the reality that the father and daughter are having sex with each other.