Sweet romance comes across on all of Sung Si Kyung's love songs, whether he's delivering a slower ballad or brisk disco pop. The key is his smooth voice, which imbues every word out of his mouth with suavity and cool. It adds gusto to slow-burning, horn-accented ballads such as “To You”, while making the sleek, vocoder-accented glide of “Who Do You Love” all the more charming.