After the death of his mother, kyoto struggles to accept her passing. One day, his father remarries, and they start living with their new mother, mio. Kyoto demands that mio obey him if she wants to be part of the family, forcefully taking her body. Despite her resistance, he creampies her. From that day forward, kyoto's behavior escalates, but his father turns a blind eye. Eventually, the father joins forces with his son to train mio, leading to a twisted, never-ending life.