Hyolyn (효린) KOREAN OST Hyorin/Hyolyn (효린) – Hello/Goodbye (안녕) 안녕 annyeong “Hello” [Single] 별에서 온 그대 (You Who Came From The Stars) OST Part.4 2014.01.22 Hyorin Lyrics/작사: 최재우 Composer/작곡:…