Salesman Mr. Jung

Chief researcher-turned-salesman Jung at Myungshin Pharmaceuticals works hard to sell medicine. One night, Jung parks his car in his neighborhood and sees a bunch of students smoking in an alley. He nicely tells them not to smoke with good intentions but he finds windows of his car broken the next day, apparently an act of retaliation by the students. That night, Jung parks his car and sees the students smoke again in the alley.