SECRET's agency, TS Entertainment, revealed concert photos from the girl group's recent solo concert in Japan.

The photos revealed the members looking fresh and fun in perfectly coordinated blue and white outfits while they performed hits during their third solo concert, titled "2014 Secret's Summer LIVE - YooHoo" in Japan.

SECRET has consistently and successfully become more and more popular through their various appearances on TV shows, music programs and dramas, becoming an even more dynamic group in the process.

The four-member idol group has already begun their comeback through large-scale poster promotions since July 28 and is set to make their official comeback this August.

The K-pop group's fifth mini-album will be titled "SECRET SUMMER," according to the publication Star N News.

The title track of the album is going to be "I'm In love" and it is reportedly said to be a collaboration with top musicians, songwriters, lyricists and recording engineers that teamed up just for SECRET's comeback.

The single was written by Double Sidekick while the song's music video was produced under director Hong Won Gi. The dance team, PLAY, designed SECRET's new choreography.

SECRET has plans to comeback in full force, even releasing a TV advertisement via Naver Music recently to further promote their summer comeback.

Although the group was on hiatus in Korea, it managed to grasp the hearts of fans in Japan through its new Japanese single "Yoo Hoo."

The track was originally released in Korea back in April 2013. Many people in Korea had shown interest in "Yoo Hoo" after it was released and Japanese fans have done the same as well.

"SECRET had made big hits in Japan with 'I Do I Do' and 'Madonna' in the past. We believe that 'Yoo Hoo' will also captivate many Japanese fans' attention," stated a representative from TS Entertainment before the song's official release.