第 130 集: 大雄使用微笑耳機來治癒他的無聊

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Nobita is so bored he annoys Doraemon into giving him a smiling earphone. When Nobita puts it in his ear, he hears much funny stuff which makes him laugh uncontrollably. This first upsets his mother, then his friends who think he is laughing at them. (Source: Wikipedia)