Sin graduated from Korean Academy of Film Arts. He won an award at Seoul Independent Film Festival with his short film "Ppangdonas" in 1998. Another short film "Cotton Candy" Sin directed, was invited to Puchon International Fantastic Film Festival and Mannheim-Heidelberg International Film Festival in 2000. He also directed a short film "Goat's Lover" which was invited to the Rotterdam International Film Festival and Vancouver International Film Festival in 2001.