Shinichi is a 40-something salaryman with a wife and kids, but he has always seen his mother as a woman. One day, when they were alone, he confessed his feelings and tried to pin her down. At first, Saya refused, but after being asked repeatedly, she agreed to a secret trip together. Just for today, she told herself, to help her son, but her body craved the man. What started as a one-time thing turned into endless pleasure.