After releasing their teaser for their retro comeback, "Shy Boy" yesterday, SECRET has returned with yet another teaser, this time in the form of an album jacket photo. TS Entertainment released a single photo of the group on January 4th, which features a retro club background and the girls donning crisp white�suits. The girls will be releasing their "Shy Boy" single on January 6th. Stay tuned to allkpop for further updates! Source + Photos: Osen via Daum