Nam Se-Hee is a fictional character from the South Korean television series Because This Is My First Life. He is portrayed as a pragmatic and introverted man who works as a web designer. Se-Hee values stability and often struggles with the pressures of societal expectations regarding relationships and career. In the series, Se-Hee enters a contract marriage with Yoon Ji-Ho, a woman seeking financial independence. Their unique arrangement explores themes of love, companionship, and the challenges of modern life. The character's journey highlights the complexities of personal growth and emotional connection in contemporary society.