The song was written and produced by Park Jin-young and it samples Stacey Q’s “Two of Hearts” written by John Mitchell. “Tell Me (Rap version)”, featuring Yubin’s rap verse, was added as a B-side on their second maxi single, So Hot. Yubin is credited as the writer of the version.

“Tell Me” was a strong hit from the group, topping various online and offline charts. It went to number one on various charts and received number #1 position on KBS’s music chart show Music Bank, staying at that position for seven consecutive weeks and received a triple crown at SBS Inkigayo.

The song is notable for its choreography, which was widely imitated and featured on various online video sites.