"I'll comfort you," said Yumiko, unable to refuse her son as he approached her. Her son couldn't bear to see his mother, frustrated and unable to stop masturbating, so he tried to comfort her. Yumiko could sense that his driving force was kindness, not insane desire, and so she accepted the forbidden relationship. However, her son, who inherited Yumiko's hypersexual blood, is also a sex monster. His virility, which allows him to instantly recover no matter how many times he ejaculates, eventually robs Yumiko of her ability to make calm judgments...