The Navel (2020)

The self-confident guy spends his leisure time mocking the social survey operator who called him. Having provoked the operator to interrupt the telephone conversation, the guy suddenly encounters a mysterious voice, the source of which is quite difficult to detect, because it belongs to the navel of the guy himself. Now the guy himself becomes the object of bullying and, as a result, is forced to recognize himself as a loser and honestly admit his own imperfection.