Yoon Myung Seon is a South Korean composer, lyricist, poet and arranger. He is recognized as one of the most prolific composers of his time with hit songs for musicians in different genres such as Eru’s "Black Glasses", Super Junior’s "Rokkuko", trot singer Jang Yoon Jeong’s "Oh My Goodness", Lee Seung Chul’s "The Western Sky", among many others. He served as the chairman of the Korean Music Copyright Association from 2014 until 2018 before moving to his present position as vice-chair of Asian-Pacific Music Creators Alliance.
(Source: MyDramaList)