With her husband away from home, Rena's sexual frustration was at its peak. At that time, her son's classmate, Kosuke, came to visit the house... He was excited by the tan lines that stood out on her voluptuous body and couldn't help but get an erection. Rena tried to release her pent-up sexual desire with Kosuke's young cock, but... Kosuke had a virile constitution that never faded, no matter how many times they had sex. No matter how many times she ejaculated, he kept wanting more and more, and Rena's body began to scream in pain as he continued to violate her and make her cum over and over again...