Food Visualization Gas

The episode starts at Nobita walking and he saw his friends at a vacant lot, where Suneo is talking about....

Then they heard voices coming from downstairs, which is Goro Nobi, one of Nobita's cousin. He asked Nobita if Tamako is home and Nobita proceeds to find her, but she isn't in the living room or the kitchen.

The episode ends at Nobita's dad, Nobisuke Nobi, just got back home from work and he saw Tamako, Doraemon and Nobita at the living room, who are all extremely full from the food they ate at the images.