The son of her sister, who is married to an international woman, came to Japan to continue his studies and ended up staying with Marina and her husband. When she reunited with her nephew for the first time in eight years, she found that he had grown into a fine half-black man, and of course his penis had grown to mega-sized proportions. When Marina saw her nephew's rock-hard cock, she couldn't control her desire and, at her nephew's request, they became immersed in forbidden incestuous intercourse...!!