Mostly known for their ballad soundtracks for popular television dramas, the girls of Melody Day are back with their latest music video for "Speed Up," returning with a new look and style.  

Their last comeback was in 2014 with "Love Me" where they showed a refreshing image. However, this time around, they are back with a fierce, minimalistic, chic look to complement their new music video and single album and to appeal to fans in a different way. GOT7's Jr. also makes an appearance in the music video. 

Melody Day's third single album, "Speed Up," contains three tracks - title track "Speed Up," "Want Your Bag," and "Hallo" - and is currently available for purchase on various major music sites. 

The group chose the name Melody Day because, according to them, "just like there are an enormous amount of different melodies, we also have an enormous amount of various ways to show our skills and attractiveness." 

The group consists of four members: Yeo-eun, Ahn Ye-in, Cha-hee, and Na Yoo-min, who joined the group in October of 2014. 

Check out their music video for "Speed Up" below!