Due to her indifferent husband, Yukiko had been sexless ever since giving birth to her son. For a long time, Yukiko had been soothing her lonely nights by masturbating, but her son Akira had seen the whole thing. Unlike her husband, who hadn't even touched her for decades, Akira had a kind and caring Kokoro, and above all, he was full of sexual desire. Yukiko was surprised by his extraordinary sexual prowess. Forgetting that they were mother and son, they passionately sought each other, pressing their hungry bodies together and kissing greedily, beginning an endless, immoral intercourse...