Earlier today, the girls of Nine Muses unveiled their debut single, No Playboy, and soon followed with the release of its MV. Just a while ago, the girls performed their debut stage on today's episode of Mnet's M! Countdown! The nine girls performed their debut single, No Playboy, and their performance showcased their impressive choreography and catchy tunes of the song. Was their debut stage great? Check it out below to decide for yourselves!