So this is what they were hiding in their silhouette images! The four members of Girl's Day are embracing the summer season, looking amazing in their black and white swimsuits!

The above photo is the second released photo as a teaser for their "Ring My Bell" MV teaser coming up. Dream Tea Entertainment stated that this is their swimsuit fashion concept for a portion of the music video. We're seeing a bit of a '60s mod' look, especially with the black and white outfits and furry hats, and we're loving it!

One of their company's representatives stated, "The swimsuit fashion was chosen to fit with the refreshing summer concept for the MV. Their fashion concept will maximize the fun and brightness of their new song "Ring My Bell". Their song will take away everyone's worries and weariness during the hot summer in one swift move."

SEE ALSO: Original Girl's Day member Hwang Ji Sun makes a comeback to the entertainment industry

Each new teaser image is making us really look forward to their upcoming album and MV, and we know you are too! Stay tuned for their release on July 7!