One day, Nanami, a married woman who dreams of having a child with her beloved husband, receives a letter. "Hello, baby..." A man wearing a balaclava appears and, as Nanami flees, he strips her of her clothes and forces his penis into her. Despite it being her ovulation day, Nanami is creampied by the unknown man, who ridicules her. A month later, Nanami is tormented by fear and disgust, and the man appears again... A crazy rapist who is obsessed not with raping her, but with impregnating her with his own genes!!