Mayu swings a shaker at a small counter bar in place of her sick father. One day, Katayama, a real estate broker, visited the store saying, "This building is for sale, so I came to check it out." This man is actually a continuous strong demon who is making a noise in the world. He is making a profit by bargaining for a bargain by causing a strong incident in a property negotiated for sale. Kataoka, who was looking for a woman while previewing the property on that day, set his sights on Mayu as his next target.