Which episode is this picture of Doraemon and Nobita?
One day, Nobita lived the same life as before. After returning home, Doraemon suddenly said that she would go back. Daxiong is very sad. Later, after his father comforted him, he understood the mood of Doraemon. He knows that if he can't understand Doraemon's mood, Doraemon can't go back even if he wants to. In that case, Doraemon would be too pitiful. At the farewell party, Doraemon ate a lot of gongs and had a good time. As night falls, Doraemon and Nobita go for a walk. Although the weather is very cold and it is snowing heavily ... Doraemon still feels uneasy. Daxiong replied: "Don't underestimate me, I will work hard. I swear: even if it is me, I will do it wholeheartedly! " Doraemon was moved by Nobita's words, and he cried. In order not to let Daxiong see his tears, he tricked Daxiong into going to the toilet. I don't know if this is coincidence or misfortune. Daxiong met Pang Hu! He didn't shout Doraemon, because he knew that Doraemon couldn't go back safely if he shouted Doraemon at this moment! Hiding from Doraemon, he summoned up the courage to fight Pang Hu one-on-one, and Daxiong defeated Pang Hu desperately. Doraemon was very moved and they went home. At home, Nobita went to bed, and Doraemon went back by time machine. It was April Fool's Day in 1 year, and her husband lied to Daxiong that he had found the legendary snake, which caused Daxiong to be bitten by a dog. Forget it, Pang Hu also said Doraemon is back! Daxiong was heartbroken until he knew he had been cheated. After drinking USO800, the prop left by Doraemon when he left, he said that Fu Xiao would not be bitten by a dog, and Fu Xiao was bitten by a dog! Pang Hu was also taken away by his mother ~ ~ Although he won, Nobita was not happy because he knew Doraemon didn't come back. He said, "How can Doraemon come back ... Doraemon will never come back ..." He went back to his room and opened the door. There was Doraemon, Nobita's good partner! Doraemon explained that Daxiong drank USO 800 and couldn't come back. Nobita and Doraemon hugged each other, and then Pang Hu, Fu Xiao and Jing Xiang came. Everyone is happy to learn that Doraemon is back, and Pang Hu has accepted Doraemon. Everybody is happy!