A mother named Nozomi, who is not good with computers. Her daughter Minami invited her boyfriend Daisuke to their home to teach her how to use a computer. As the two of them were teaching each other in close proximity, both the mother and Daisuke began to feel sexually aware of each other. Despite being concerned about his mother, he was having sex with Minami in her room when he noticed her mother masturbating while peeking at them from the hallway! That night, as Daisuke was taking a bath alone, Nozomi said, 'Let me wash your back!' and started washing the bewildered Daisuke's back. Frustrated and having his back washed, Daisuke became aroused. Nozomi, seeing his manly member, couldn't help but suck on it. Once their desires were ignited, the two of them, driven by the taboo of her being his girlfriend's mother and him being her daughter's boyfriend, engaged in intense intercourse...
