Hitomi married Yuji's father, who is sickly and introverted. Despite the difficulties of their married life, Hitomi continues to take care of Yuji without a single complaint, showing her kindness and her voluptuous bodyline even through her clothes... Yuji, who is at an age where he is starting to become interested in women, doesn't take long to develop feelings for Hitomi. One day, when Yuji's childhood friend Shingo comes over, Yuji witnesses Hitomi and Shingo indulging in obscene acts...