Yuu gives advice to her son's friend, Shinji, about his future. However, in the middle of the conversation, she can't help but get turned on by his hard cock... It was just a light release, but he has a virility that never fades, no matter how many times he ejaculates! Yuu is made to cum all night long, but she finally feels that she has reached her limit and refuses, but... Shinji, possessed by the voluptuous charm of an adult woman, keeps coming at her day and night without a break. And finally, Yuu's body reaches its limit due to his bottomless sexual desire...