A few years ago, Kaede and her son Shintaro had a physical relationship, even though they knew it was wrong. However, recently, since Shigefumi quit his job and started working from home, they couldn't have sex, and the two of them were increasing their desires. One day, Shigefumi goes jogging. Shintaro doesn't miss that opportunity and asks Kaede to have sex with him. Despite being frightened by the thrill, from that day onwards, the two of them started dating for a limited time when their father was gone...
