Cube Entertainment has just revealed that they'll be launching a co-ed "performance unit" called Trouble Maker! The agency unveiled the unit's album jacket photo through their homepage, along with the announcement that Trouble Maker is comprised of B2ST's Hyunseung and 4minute's HyunA. The photo features a "private party concept" with HyunA and Hyunseung dressed in all black. Expectations are rising high for a provocative, yet sophisticated show that will encompass both HyunA and Hyunseung's charms. Their first mini albun, 'Trouble Maker',consists of a dance track as well as an emotional ballad. The unit will start revealing their teaser photos on November 25th through their teaser site, and will unleash their album on December 1st.