 In 1965 he won a prize with a children's story in the New Year’s Literary Competition sponsored by Chosun Ilbo.Yoo made his literary debut with the serial children's tale "The Gangly Balloon" (키다리 풍선, 1994), which was printed in the "Chosun Ilbo" in 1965.Thereafter he published novels including "Sanctuary" (성역, 1980), "Gone into the Wind and Rain" (비바람 속으로 떠나가다, 1982).