The moans of his mother Mio come from his parents' bedroom. Hearing that voice, which is so erotic, Keita feels an intense emotion well up within him. The truth behind it is jealousy towards his father. He cannot forgive the fact that he knows the lewd side of his mother that he has never seen, that he has made her cum so many times, and that he has creampied her. Letting his twisted desires run wild, Keita plots to monopolize his mother's love and body. The way to do this is to pour his sperm into her womb and expel his father's sperm from her womb.