Wonder Girls are starting to do their teasing!

The first member introduced for their new band format is Sunmi, who is actually rejoining the group.  She's on the bass, looking eerie and mysterious with dark lipstick, thickly lined eyes, and a flowing white outfit that blows around her for a beautiful effect.

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The sound of the teaser is simplistic as she strums away on her bass guitar. Look forward to their comeback on August 3!