All For 9900 Won summary:

After finally finding a job, Myeongwoo ends up being ordered to present his company's new products as a door-to-door salesman. While doing his rounds, he meets what appears to be the snobby employee of a huge and very important company, who turns down Myeongwoo's "excellent chinese-made digital camera, fresh off the line!" After drinking his sorrows away, he somehow finds himself sleeping at the snob's house. Little does he know, he is about to discover the stranger's dirty secret...