Baek Ah Yeon continues to prepare to release her 5th mini-album, 'Observe,' and continues to prepare for her comeback.

The solo singer has been releasing teaser photos where she casually takes her own photos in a photo booth. Then, Baek Ah Yeon released the MV teaser where she feels lazy to do anything, followed by a creative moving teaser image showing the lyrics to her song "0%."

Then on September 2 at midnight, she released a highlight medley giving a preview of all the tracks to her fifth mini-album. The album includes five tracks, including her title track "0%."

Baek Ah Yeon has been releasing teasers since last week and will be releasing her mini-album on Sept 7 KST. So stay tuned for another week for the release of her mini-album.