Ahead of "Once In Summer," their pre-release track before the release of 'Part A' of their very first studio album, Sunny Hill revealed teaser images for all four members through their Facebook page. �

SEE ALSO: Sunny Hill unveil teaser image and announce pre-release track 'Once in Summer'

The pictures take you back to simpler times with an almost retro feel, especially with SeungA dressed in what looks like a school uniform in a more rural setting. �The rest, likewise, capture that nostalgic feel as they sit inside a vintage looking home and the colors are toned down to further enhance the vintage vibe. �

There's a lot to look forward to as this will be the girls' first comeback within about a year since releasing mini-album 'Young Folk' in June, 2013. �While "Once In Summer" will be out on August 1 at noon KST, 'Part A' will come out a later date in August.