Modeun Guseong 9900 Won

On the first day at his new job, Myeong-Woo 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 him down. After drinking his sorrows away, Myeong-Woo somehow finds himself sleeping at the snob’s house and discovers the stranger’s dirty secret...

(Source: Bomtoon, translated)