Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 공부할때 듣는 음악 모음♬ (집중력 높이는 음악) |아련한, 슬픈, 잔잔한 음악 1시간. That video is uploaded by Tido Kang at 2019-04-18T03:55:17-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [uw_elzX7Oo4]