Round 1 is the first extended play by South Koreangirl groupC-REAL. It was released on October 12, 2011. They started promoting their debut song No No No No No from the album on the same day.[1]
The EP was produced by various top musicians in the music industry such as Choi Kap Won, Brave Brothers, Kim Do Hoon, Wheesung, PJ and Shinsadong Tiger.[1] Their debut single from the EP No No No No No was done by hit making producer, Brave Brothers. According to representative Choi Kap Won, the album has a track that have emotions and feel that fits best girls that age.[2]