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.
Nobita debe gemir durante una hora de su madre, por lo que Doraemon le da un reloj que acelera o ralentiza el tiempo en cualquier área.
