His mother, Arika, has learned that her son, Kosuke, was switched at a young age, but has continued to hide the truth. And when she finally tells Kosuke the truth... He learns that he is not related by blood to his mother, and he pours out the feelings he had been hiding, and desires her strongly. Now that they know each other's feelings, the two of them strongly intertwine their tongues and cross the line... Arika, who is crazy about cock and wants a child, continues to ask for creampies over and over again. As if in response, Kosuke also fucks her violently, not wanting to get her pregnant...