Sunny Hill is preparing to drop 'Part A' of their very first full-length album! �Before that, however, they treated fans to some eye candy by releasing 'Sunny Blues' teaser images of the ever sexy Kota and SeungA.

While the girls looked sweet and innocent for their pre-release track, "Once In Summer," it looks like that won't be their concept for their official comeback. �With a bright green wall as their backdrop, both Kota and SeungA look glamorous in black, suggesting a return to their more hardcore concepts.

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Stay tuned for the other two members!