Nam Do-san is a fictional character from the popular South Korean television series Start-Up. He is portrayed as a talented and ambitious young entrepreneur who dreams of creating a successful tech company. His character is known for his intelligence, determination, and strong work ethic, which he demonstrates throughout the series. In Start-Up, Nam Do-san is depicted as the founder of a start-up company called Sands, where he navigates the challenges of the business world alongside his friends and colleagues. His journey highlights themes of innovation, friendship, and the pursuit of dreams in the competitive landscape of the tech industry.