K-pop composer Seo Gi Jun says that it is rare for unknown singers to get the chance to sing OSTs for k-dramas. But when it happens it gives the audience an opportunity to discover new voice. He further added that for him as a composer, an OST is more important than a k-drama. K-Pop Composer Seo Gi Jun Says Popularity of K-dramas Like Goblin, Itaewon Class and More’s OSTs Help New Singers.