Girl group Rainbow recently unleashed their mini-album "SO?", and since the release, the girls have been doing well on various music charts.

Rainbow has just started to promote their album, but 'To Me' has been entering the top 5 on many digital music websites already. On the Mnet music chart, Rainbow is placed 4th, and on Melon, Soribada, and Daum, 'To Me' is placed in 2nd, proving the song's great popularity. Source + Photo: Newsen