Sung Si Kyung so sing the title track of Yoo Hee Yeol's one-man band Toy's upcoming album Unknown 4:30:00 PM sung si kyung, Three People, toy, yoo hee yeol Comments Sung Si Kyung has been revealed to sing the title track of Yoo Hee Yeol's one-man band Toy's new album. On November 7th, Antenn... Read More Share: