Forbidden humiliation - Mother turned into her son's sex slave -

Aya has a serious husband, Kenji, who is a doctor, and has a son, Akihiko, who is a prep school student. However, there is no sign that he will be accepted into university. Kenji believes that his son has Aya's blood, and continues to refuse to have sex with him. One day, Aya is stunned when the stocks she had invested in without telling her husband plummet. Akihiko learns of this and approaches Aya. Akihiko, who has a dark shadow in his heart, rapes his mother and turns her into a prostitute who takes customers. However, Akihiko's real purpose was to make Aya his sex slave.