Suzuhana has a son who is a student at a cram school. One day, when she comes home from shopping, there is a young man crouching at the entrance. It is her son's friend, Tooru. Apparently he had a fight with his parents and ran away from home, and has been going from friend's house to manga cafes, and yesterday he was out of money and spent the day on the riverbank. Suzuhana treats Tooru to a hot meal, but Tooru, who is also sexually starved, attacks Suzuhana. Her ripe body is brought to orgasm again and again by the young meat rod that continues to pour out, even though it is right next to her son...