Sunny Hill confirmed previous hints at their comeback by unveiling a teaser image and also announcing the upcoming pre-release of a song ahead of their return with their full-length album 'Part A'!

Sunny Hill caught eyes with the teaser image of their new start as a four-member girl group following the leave of male member Janghyun earlier this year. The girls will pre-release "Once in Summer" with a MV on August 1 at noon KST to get you prepared for more good music to come.

'Part A' is expected to drop sometime later in August.

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� ?? (@_SunnyHill) July 28, 2014

{ Album Teaser } 2014. 08. 01 #??? #?_?_?? ?_? pic.twitter.com/ENDfDiSjfr

� ?? (@_SunnyHill) July 29, 2014