The Last Oden

A man who had been eating oden in a convenience store for ten years received a note from the cashier: "Don't come here again, you are not from this world." He thought he had encountered a prank or a science fiction event, but step by step he discovered that the "different world" was his imaginary refuge, the "convenience store" was the anchor of his traumatic memory, and the cashier who handed the note was his psychiatrist who had been missing for ten years.