It's been awhile since we've seen the 7 prismatic ladies of Rainbow perform on-stage since their promotions for Not Your Girl, but they're back, and this time with a brand new concept for fans. The teaser for title track A (yes, the letter A) was released through various music sites on the 10th where their new dazzling looks were revealed. With what looks to be powerful dance moves, these girls are working hard to better get their name known this time round. With the release of their album pictorial during the past few days, many have been looking forward to what they have to bring, and now we get to observe some of the fierceness Check it out below! DSP Entertainment has also stated that A will formally be revealed next week, however before then, the ladies will be performing on KBS Music Bank on the 13th. Stay tuned!