Peppermint Candy

Outdoor Excursion: Spring 1999. A group of middle-aged, working-class friends meet for the 20th year reunion of their old factory worker's association. While they sing and dance up a storm, their long-lost friend Yong Ho shows up, disrupting the party. He climbs on top of a railroad track and refuses to budge despite the danger of an approaching train.
What follows is a series of prior events in the main character's life that show how he became the suicidal man portrayed in this scene.