After releasing her comeback mini-album for "Heartmade" earlier today,�JOO has returned with the official music video for her title track, "Bad Guy." 2PM's Chansung guest-stars in the music video as a bad guy, and his transformation has been described as 'dramatic'. Consequently, he's earned the named 'Dark Chansung'. In the video, fans can watch the interesting overlap between JOO and Chansung's past relationship, and their current heartbreaking reality. Check out JOO's comeback video below: http://www.youtube.com/watch?v=a-_GgKg3BDM Tip: Jenny