Singer Kim Ji Yeon, who was a hit in the '90s with her song "When the Cool Wind Blows", made a surprise re-emergence after 17 long years through her participation for OCN's "God's Quiz 2" OST! She debuted back in 1998 through University Music Festival and landed her biggest hit with the song the song "When the Cool Wind Blows", which was used as actress Lee Sang Ah's theme song in the drama "Flowering Tree". In 1994, after releasing her 3rd full album, Kim Ji Yeon left the entertainment industry for what seemed like good until she surprised music fans everywhere on June 17th with the release of "Just Until Then" for "God's Quiz 2." Even after almost 20 years, Kim Ji Yeon showed off her clean, pure voice.  The song is definitely a pleasant surprise and present for fans, and many have claimed that it reminds them of the days back then. Officials from CJ E&M stated, "Because it's been such a long time, this will be a good chance to hear Kim Ji Yeon 's smooth voice." Source: JKN News