He is an old man who lives comfortably on his pension without getting married, but he has a problem that "Even if I have a girlfriend, I will get tired of sex." One day, when the old man had a fight with her girlfriend and broke up, he decided to call a delivery health to relieve her loneliness. And the old man is fascinated by the super-professional technique of the black gal, Umi, and begs him to do it somehow.
