Rainbow's unit group Rainbow BLAXX caught much attention with their shocking teaser image.

Today, they revealed their 2nd member Hyunyoung along with a video that 'scanned' her body from head to toe. Towards the end of the video, she was semi-nude.

In the semi-nude photo, Jo Hyunyoung was only wearing a black bra anda zip-up jacket, revealing most of her top body. Even though it was only for 1 second, it was enough to catch the attention of the viewer.

Girl group Rainbow announced Rainbow Black's sexy comeback teaser image on January 1. Their teaser that has been released one by one has been increasing the excitement.

Their comeback will be at the end of this month.

Photo Credit: Rainbow Black