Mayu shakes at a small bar in place of her sick father. One day, Katayama, a real estate broker, visits the store and says, "This building is for sale, so I came to take a look." This man is actually a powerful demon who constantly makes noise in the world. He is making a profit by bargaining for a bargain by causing a strong incident in a property that is being negotiated for sale. Kataoka, who was looking for a woman while previewing the property that day, targeted Mayu as his next target.