Brave Girls showed a very elegant and feminine charm for their debut song 'Do You Know', but now they'll transform radically for their upcoming 'So Sexy' music video. In it, they're seen wearing charismatic uniforms, making fan boys especially excited for their return. In the images that were revealed, the girls show off an enchanting and sexy dance. Member YeJin, who had boasted of her purity, sports an eye-opening bright blue wig and uniform style. 'So Sexy' was produced by Mr. Kang along with top producer, Brave Brothers and they had a hard time deciding between 'So Sexy' and 'Do You Know' when choosing the title song. Since broadcasters believed the song trend of 'So Sexy' was coming to an end, the producers ultimately decided to go for the more soothing and tranquil song of 'Do You Know'. However, because that style can get somewhat easily boring, they decided to have a transformation and hope that it will be a pleasant change of pace for their expectant fans. The netizens stated things such as, "It's so sexy, just like it says!", "A totally different feeling from 'Do You Know'", and "Is there an end to Brave Girls' charisma?" Source: Nate