Yuka, a visiting care worker, has a hard time making a living, and earns her living by having elderly people fondle her breasts at the places she visits. - The grandson of the old man who secretly filmed it turned out to be a classmate of Yuka's son, Kosuke! - Kosuke was shocked when he was shown the video, but he became deeply interested in the woman closest to him, his mother. - And in order to teach Kosuke proper sex, who had the mistaken knowledge that he can have sex if he hands over money like an old man, Yuuka uses her own body to provide sex education.