Right after Daisuke decided to live alone, his father left home with another woman. Daisuke was worried about leaving his mother Miyu all by herself. He even considered giving up on living alone. It was then that he caught Miyu masturbating and sobbing. Witnessing the scene stirred within him both love for his mother and lust for a woman. Two feelings that should never intertwine became one because of Miyu's sad and seductive figure.
