Sung Yong-il (성용일) is a South Korean director.
Known for
Duty After School
2023 · Series · Director
Class of Lies
2019 · Series · Director
Dr. Frost
2014 · Series · Director
Fighter Choi Kang-soon
2018 · Director
Directed
Duty After School
2023 · Series · Director
Class of Lies
2019 · Series · Director
Fighter Choi Kang-soon
2018 · Director
Dr. Frost
2014 · Series · Director
