Saori is a mother of two sons. Because her younger brother is sickly, Saori treats her older brother Kiyoshi with neglect and only cares for him. Kiyoshi begins to Kokoro intense jealousy towards his mother, and, driven by his desire to make his mother his own, he seeks out Saori's body and caresses her. Then, Saori's feelings change as her body is forcibly taken by her son...