Mayu shakes a shaker on a small counter bar in place of her ailing father. One day, Katayama, a real estate broker, visited the store saying, "This building is for sale, so I came to see it." This man is actually a continuous strong demon that is making a lot of noise in the world. He is making a profit by making a strong case in a property that is negotiating for sale and is making a profit. On this day, Kataoka, who was looking for a woman to preview the property, set his sights on Mayu as the next target.