Jaekyung sings the OST for 'God's Quiz 4' Unknown 11:30:00 AM Jaekyung, Kim Jaekyung, OST, Rainbow Comments Rainbow's Jaekyung sings the first OST of her starring drama 'God's Quiz 4'. Jaekyung lends her beautiful voice in the ballad OST 'Maybe I' accompanied with refreshing acoustic guitar. Listen below: Email Post ← Newer Posts Older Posts → Home