Trouble Maker is a special performance unit comprised of�4minute's HyunA and B2ST's Jang Hyunseung (a.k.a.�JS). When it was revealed that these two idols would make up the unit, many in the music industry took notice and mused, "This is a unit that nobody could have imagined."

In their teaser photo, HyunA and JS took sequenced shots arranged in such a way that it resembled an intricate dance. JS gave his trademark 'cool-guy' glare, which HyunA matched with a strong expression of her own. There's no set concept yet, except to showcase bold confidence.

Trouble Maker will release their debut EP on December 1st, but stay tuned for more teasers�from the duo.