Shinya's daily routine is to peek at his mother Ryoko masturbating in the bathroom and make fun of her. Today again, as usual, when I was masturbating while imagining Ryoko masturbating, Ryoko caught me and got mad at me. The son, furious at the sudden incident, attacks him and says, ``Your mother does this all the time!'' Ryoko reflects and accepts Shinya's feelings, saying, ``It's all my fault that my son turned into this.''