Rena went on a hot spring trip with her beloved son. To others, they might seem like a loving mother and son, but in reality, they were in a forbidden relationship, and this trip was also for the purpose of fully loving each other in the hot spring. As soon as they arrived at the inn, they quickly went to a private family bath. The son entered first, and Reiko followed later. Seeing this, one of the male guests told his companion that the woman was good, so they should go and peek, and the two of them followed Reiko and began to peek stealthily. In the bathtub, the son was waiting, and Reiko apologized for making him wait and entered the bathtub. And as usual, they exchanged hot kisses while enjoying the honeymoon of mother-son incest. The men who were peeking were surprised, seeing Reiko mixing with her grown son in the bath and even starting sexual behavior, they quickly took out their smartphones and began to secretly take pictures of the two. That night, the man approached Reiko pretending to be a coincidence, showed her the video he had taken, and threatened her. Although Reiko had become strong, she could not defy the man and was confined as he ordered. Reiko, whose heart was not in it, was enjoying the trip with her son and eating dinner. Then suddenly, the men appeared, saying that the innkeeper had asked them to bring Reiko, and although Reiko knew what they were going to do, she had no choice but to follow quietly...