Thunder (천둥) - Sign (Feat. KOO HA RA (구하라)) Lyrics Mini Album: THUNDER Lyrics: 김이나, 천둥 Composition: 배진렬(JR Groove), KZ, 천둥 Arrangement: N/A Release date: 2016.12.07 THUNDER - SIGN HANGUL 넌 … [Read more...] about Thunder – Sign (Feat. Koo Ha Ra) Lyrics