Synopsis

Weary with ennui, Nobita pesters Doraemon until the robotic cat yields a smiling earphone. As soon as Nobita inserts it, a cascade of amusing sounds floods his ears, triggering bursts of uncontrollable laughter. Initially, this amuses him, but the sound soon grates on his mother's nerves and then unsettles his friends, who mistakenly believe he’s mocking them.