Explain the basic story in Exercises in Style.

The first man, or young man, boards a crowded bus wearing a felt hat adorned with a plaited cord rather than a ribbon. The young man accuses the second man of stepping on his toes every time someone boards or leaves the bus. After a brief confrontation, the young man sees a vacant seat and sits in it. Later that day, the narrator sees the same young man talking to a friend who is advising him about the placement of a button on his overcoat.