Sayaka lived peacefully with her husband and son, but the lack of intimacy with her husband had become a dark burden in her heart. One day, her son's friend Yuki came over to hang out. They were having fun watching an adult DVD in her room when Yuki suddenly decided to go to the bathroom. However, he forgot to close the door and accidentally came face to face with Sayaka, who got an up-close view of his fully erect member. That vivid image of his rock-hard cock remained deeply etched in her mind, impossible to forget.