Doraemon received several sample items from the future department store like a Raw Material Lights. He doesn't need all the sample gadgets offered and threw them in the trash. But for Nobita this is an interesting thing. Then Nobita bring a shopping bag and put all the sample gadgets into the bag. Before Nobita left the house he accidentally use Raw Material Lights to turn Doraemon's Dorayaki into raw materials, this make Doraemon angry with him.