The classics of sculpture

The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised.
Seong, a gambling addict who barely managed to get a job at a delivery company! On his first day at work, he receives a complaint about a misdelivered package and hurries to find a solution.However, when the door opens, the customer he sees is in a rather unusual condition..? What is the story behind Seong revealing all of his intimidating lower body to Min-tae, who introduces himself as a sculptor and asks him to be a model !?